diff --git a/.nvmrc b/.nvmrc
index f04bd6d..46a8184 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-v12.0.0
+v12.18.1
diff --git a/.travis.yml b/.travis.yml
index a73ea2e..0eacb7b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,7 +2,7 @@ sudo: false
 language: node_js
 
 node_js:
- - 12.0.0
+ - 12.18.1
 
 branches:
   except:
@@ -13,7 +13,7 @@ env:
     - ISTANBUL_COVERAGE: yes
 
 script:
- - nvm install 8.10.0
+ - nvm install 8.17.0
  - sh scripts/build.sh webpack-4
  - yarn lint
  - yarn test:webpack-2
diff --git a/env/webpack-4/yarn.lock b/env/webpack-4/yarn.lock
index d499427..04c97ab 100644
--- a/env/webpack-4/yarn.lock
+++ b/env/webpack-4/yarn.lock
@@ -559,7 +559,7 @@ camel-case@3.0.x:
     no-case "^2.2.0"
     upper-case "^1.1.1"
 
-chalk@^2.0.0:
+chalk@^2.0.0, chalk@^2.1.0:
   version "2.4.2"
   resolved "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz#cd42541677a54333cf541a49108c1432b44c9424"
   integrity sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==
@@ -576,14 +576,6 @@ chalk@^3.0.0:
     ansi-styles "^4.1.0"
     supports-color "^7.1.0"
 
-chalk@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.npmjs.org/chalk/-/chalk-4.0.0.tgz#6e98081ed2d17faab615eb52ac66ec1fe6209e72"
-  integrity sha512-N9oWFcegS0sFr9oh1oz2d7Npos6vNoWW9HvtCg5N1KRFpUhaAhvTv5Y58g880fZaEYSNm3qDz8SU1UrGvp+n7A==
-  dependencies:
-    ansi-styles "^4.1.0"
-    supports-color "^7.1.0"
-
 chardet@^0.7.0:
   version "0.7.0"
   resolved "https://registry.npmjs.org/chardet/-/chardet-0.7.0.tgz#90094849f0937f2eedc2425d0d28a9e5f0cbad9e"
@@ -770,14 +762,16 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
-cross-spawn@^7.0.2:
-  version "7.0.3"
-  resolved "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz#f73a85b9d5d41d045551c177e2882d4ac85728a6"
-  integrity sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==
+cross-spawn@^6.0.5:
+  version "6.0.5"
+  resolved "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz#4a5ec7c64dfae22c3a14124dbacdee846d80cbc4"
+  integrity sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==
   dependencies:
-    path-key "^3.1.0"
-    shebang-command "^2.0.0"
-    which "^2.0.1"
+    nice-try "^1.0.4"
+    path-key "^2.0.1"
+    semver "^5.5.0"
+    shebang-command "^1.2.0"
+    which "^1.2.9"
 
 crypto-browserify@^3.11.0:
   version "3.12.0"
@@ -833,7 +827,7 @@ decode-uri-component@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
 
-deep-is@^0.1.3:
+deep-is@~0.1.3:
   version "0.1.3"
   resolved "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz#b369d6fb5dbc13eecf524f91b070feedc357cf34"
   integrity sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ=
@@ -1041,10 +1035,10 @@ eslint-scope@^5.0.0:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
-eslint-utils@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/eslint-utils/-/eslint-utils-2.0.0.tgz#7be1cc70f27a72a76cd14aa698bcabed6890e1cd"
-  integrity sha512-0HCPuJv+7Wv1bACm8y5/ECVfYdfsAm9xmVb7saeFlxjPYALefjhbYoCkBjPdPzGH8wWyTpAez82Fh3VKYEZ8OA==
+eslint-utils@^1.4.3:
+  version "1.4.3"
+  resolved "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.4.3.tgz#74fec7c54d0776b6f67e0251040b5806564e981f"
+  integrity sha512-fbBN5W2xdY45KulGXmLHZ3c3FHfVYmKg0IrAKGOkT/464PQsx2UeIzfz1RmEci+KLm1bBaAzZAh8+/E+XAeZ8Q==
   dependencies:
     eslint-visitor-keys "^1.1.0"
 
@@ -1053,22 +1047,22 @@ eslint-visitor-keys@^1.1.0:
   resolved "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-1.1.0.tgz#e2a82cea84ff246ad6fb57f9bde5b46621459ec2"
   integrity sha512-8y9YjtM1JBJU/A9Kc+SbaOV4y29sSWckBwMHa+FGtVj5gN/sbnKDf6xJUl+8g7FAij9LVaP8C24DUiH/f/2Z9A==
 
-eslint@7.0.0:
-  version "7.0.0"
-  resolved "https://registry.npmjs.org/eslint/-/eslint-7.0.0.tgz#c35dfd04a4372110bd78c69a8d79864273919a08"
-  integrity sha512-qY1cwdOxMONHJfGqw52UOpZDeqXy8xmD0u8CT6jIstil72jkhURC704W8CFyTPDPllz4z4lu0Ql1+07PG/XdIg==
+eslint@6.8.0:
+  version "6.8.0"
+  resolved "https://registry.npmjs.org/eslint/-/eslint-6.8.0.tgz#62262d6729739f9275723824302fb227c8c93ffb"
+  integrity sha512-K+Iayyo2LtyYhDSYwz5D5QdWw0hCacNzyq1Y821Xna2xSJj7cijoLLYmLxTQgcgZ9mC61nryMy9S7GRbYpI5Ig==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     ajv "^6.10.0"
-    chalk "^4.0.0"
-    cross-spawn "^7.0.2"
+    chalk "^2.1.0"
+    cross-spawn "^6.0.5"
     debug "^4.0.1"
     doctrine "^3.0.0"
     eslint-scope "^5.0.0"
-    eslint-utils "^2.0.0"
+    eslint-utils "^1.4.3"
     eslint-visitor-keys "^1.1.0"
-    espree "^7.0.0"
-    esquery "^1.2.0"
+    espree "^6.1.2"
+    esquery "^1.0.1"
     esutils "^2.0.2"
     file-entry-cache "^5.0.1"
     functional-red-black-tree "^1.0.1"
@@ -1081,24 +1075,25 @@ eslint@7.0.0:
     is-glob "^4.0.0"
     js-yaml "^3.13.1"
     json-stable-stringify-without-jsonify "^1.0.1"
-    levn "^0.4.1"
+    levn "^0.3.0"
     lodash "^4.17.14"
     minimatch "^3.0.4"
+    mkdirp "^0.5.1"
     natural-compare "^1.4.0"
-    optionator "^0.9.1"
+    optionator "^0.8.3"
     progress "^2.0.0"
-    regexpp "^3.1.0"
-    semver "^7.2.1"
-    strip-ansi "^6.0.0"
-    strip-json-comments "^3.1.0"
+    regexpp "^2.0.1"
+    semver "^6.1.2"
+    strip-ansi "^5.2.0"
+    strip-json-comments "^3.0.1"
     table "^5.2.3"
     text-table "^0.2.0"
     v8-compile-cache "^2.0.3"
 
-espree@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.npmjs.org/espree/-/espree-7.0.0.tgz#8a7a60f218e69f120a842dc24c5a88aa7748a74e"
-  integrity sha512-/r2XEx5Mw4pgKdyb7GNLQNsu++asx/dltf/CI8RFi9oGHxmQFgvLbc5Op4U6i8Oaj+kdslhJtVlEZeAqH5qOTw==
+espree@^6.1.2:
+  version "6.2.1"
+  resolved "https://registry.npmjs.org/espree/-/espree-6.2.1.tgz#77fc72e1fd744a2052c20f38a5b575832e82734a"
+  integrity sha512-ysCxRQY3WaXJz9tdbWOwuWr5Y/XrPTGX9Kiz3yoUXwW0VZ4w30HTkQLaGx/+ttFjF8i+ACbArnB4ce68a9m5hw==
   dependencies:
     acorn "^7.1.1"
     acorn-jsx "^5.2.0"
@@ -1113,7 +1108,7 @@ esprima@~3.1.0:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-3.1.3.tgz#fdca51cee6133895e3c88d535ce49dbff62a4633"
 
-esquery@^1.2.0:
+esquery@^1.0.1:
   version "1.3.1"
   resolved "https://registry.npmjs.org/esquery/-/esquery-1.3.1.tgz#b78b5828aa8e214e29fb74c4d5b752e1c033da57"
   integrity sha512-olpvt9QG0vniUBZspVRN6lwB7hOZoTRtT+jzR+tS4ffYx2mzbw+z0XCOk44aaLYKApNX5nMm+E+P6o25ip/DHQ==
@@ -1221,7 +1216,7 @@ fast-json-stable-stringify@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz#d5142c0caee6b1189f87d3a76111064f86c8bbf2"
 
-fast-levenshtein@^2.0.6:
+fast-levenshtein@~2.0.6:
   version "2.0.6"
   resolved "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz#3d8a5c66883a16a30ca8643e851f19baa7797917"
   integrity sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc=
@@ -1843,13 +1838,13 @@ lazy-cache@^2.0.2:
   dependencies:
     set-getter "^0.1.0"
 
-levn@^0.4.1:
-  version "0.4.1"
-  resolved "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz#ae4562c007473b932a6200d403268dd2fffc6ade"
-  integrity sha512-+bT2uH4E5LGE7h/n3evcS/sQlJXCpIp6ym8OWJ5eV6+67Dsql/LaaT7qJBAt2rzfoa/5QBGBhxDix1dMt2kQKQ==
+levn@^0.3.0, levn@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz#3b09924edf9f083c0490fdd4c0bc4421e04764ee"
+  integrity sha1-OwmSTt+fCDwEkP3UwLxEIeBHZO4=
   dependencies:
-    prelude-ls "^1.2.1"
-    type-check "~0.4.0"
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
 
 loader-runner@^2.4.0:
   version "2.4.0"
@@ -2130,6 +2125,11 @@ neo-async@^2.6.1:
   resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.1.tgz#ac27ada66167fa8849a6addd837f6b189ad2081c"
   integrity sha512-iyam8fBuCUpWeKPGpaNMetEocMt364qkCsfL9JuhjXX6dRnguRVOfk2GZaDpPjcOKiiXCPINZC1GczQ7iTq3Zw==
 
+nice-try@^1.0.4:
+  version "1.0.5"
+  resolved "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
+  integrity sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==
+
 no-case@^2.2.0:
   version "2.3.2"
   resolved "https://registry.yarnpkg.com/no-case/-/no-case-2.3.2.tgz#60b813396be39b3f1288a4c1ed5d1e7d28b464ac"
@@ -2230,17 +2230,17 @@ onetime@^5.1.0:
   dependencies:
     mimic-fn "^2.1.0"
 
-optionator@^0.9.1:
-  version "0.9.1"
-  resolved "https://registry.npmjs.org/optionator/-/optionator-0.9.1.tgz#4f236a6373dae0566a6d43e1326674f50c291499"
-  integrity sha512-74RlY5FCnhq4jRxVUPKDaRwrVNXMqsGsiW6AJw4XK8hmtm10wC0ypZBLw5IIp85NZMr91+qd1RvvENwg7jjRFw==
+optionator@^0.8.3:
+  version "0.8.3"
+  resolved "https://registry.npmjs.org/optionator/-/optionator-0.8.3.tgz#84fa1d036fe9d3c7e21d99884b601167ec8fb495"
+  integrity sha512-+IW9pACdk3XWmmTXG8m3upGUJst5XRGzxMRjXzAuJ1XnIFNvfhjjIuYkDvysnPQ7qzqVzLt78BCruntqRhWQbA==
   dependencies:
-    deep-is "^0.1.3"
-    fast-levenshtein "^2.0.6"
-    levn "^0.4.1"
-    prelude-ls "^1.2.1"
-    type-check "^0.4.0"
-    word-wrap "^1.2.3"
+    deep-is "~0.1.3"
+    fast-levenshtein "~2.0.6"
+    levn "~0.3.0"
+    prelude-ls "~1.1.2"
+    type-check "~0.3.2"
+    word-wrap "~1.2.3"
 
 os-browserify@^0.3.0:
   version "0.3.0"
@@ -2326,10 +2326,10 @@ path-is-absolute@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/path-is-absolute/-/path-is-absolute-1.0.1.tgz#174b9268735534ffbc7ace6bf53a5a9e1b5c5f5f"
 
-path-key@^3.1.0:
-  version "3.1.1"
-  resolved "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz#581f6ade658cbba65a0d3380de7753295054f375"
-  integrity sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==
+path-key@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.npmjs.org/path-key/-/path-key-2.0.1.tgz#411cadb574c5a140d3a4b1910d40d80cc9f40b40"
+  integrity sha1-QRyttXTFoUDTpLGRDUDYDMn0C0A=
 
 pbkdf2@^3.0.3:
   version "3.0.14"
@@ -2357,10 +2357,10 @@ posix-character-classes@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
 
-prelude-ls@^1.2.1:
-  version "1.2.1"
-  resolved "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
-  integrity sha512-vkcDPrRZo1QZLbn5RLGPpg/WmIQ65qoWWhcGKf/b5eplkkarX0m9z8ppCat4mlOqUsWpyNuYgO3VRyrYHSzX5g==
+prelude-ls@~1.1.2:
+  version "1.1.2"
+  resolved "https://registry.npmjs.org/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
+  integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
 pretty-error@^2.0.2:
   version "2.1.1"
@@ -2507,10 +2507,10 @@ regex-not@^1.0.0, regex-not@^1.0.2:
     extend-shallow "^3.0.2"
     safe-regex "^1.1.0"
 
-regexpp@^3.1.0:
-  version "3.1.0"
-  resolved "https://registry.npmjs.org/regexpp/-/regexpp-3.1.0.tgz#206d0ad0a5648cffbdb8ae46438f3dc51c9f78e2"
-  integrity sha512-ZOIzd8yVsQQA7j8GCSlPGXwg5PfmA1mrq0JP4nGhh54LaKN3xdai/vHUDu74pKwV8OxseMS65u2NImosQcSD0Q==
+regexpp@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.npmjs.org/regexpp/-/regexpp-2.0.1.tgz#8d19d31cf632482b589049f8281f93dbcba4d07f"
+  integrity sha512-lv0M6+TkDVniA3aD1Eg0DVpfU/booSu7Eev3TDO/mZKHBfVjgCGTV4t4buppESEYDtkArYFOxTJWv6S5C+iaNw==
 
 relateurl@0.2.x:
   version "0.2.7"
@@ -2635,15 +2635,15 @@ schema-utils@^1.0.0:
     ajv-errors "^1.0.0"
     ajv-keywords "^3.1.0"
 
-semver@^5.6.0:
+semver@^5.5.0, semver@^5.6.0:
   version "5.7.1"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
+  resolved "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
-semver@^7.2.1:
-  version "7.3.2"
-  resolved "https://registry.npmjs.org/semver/-/semver-7.3.2.tgz#604962b052b81ed0786aae84389ffba70ffd3938"
-  integrity sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==
+semver@^6.1.2:
+  version "6.3.0"
+  resolved "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
 
 serialize-javascript@^2.1.2:
   version "2.1.2"
@@ -2685,17 +2685,17 @@ sha.js@^2.4.0, sha.js@^2.4.8:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
-shebang-command@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz#ccd0af4f8835fbdc265b82461aaf0c36663f34ea"
-  integrity sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==
+shebang-command@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz#44aac65b695b03398968c39f363fee5deafdf1ea"
+  integrity sha1-RKrGW2lbAzmJaMOfNj/uXer98eo=
   dependencies:
-    shebang-regex "^3.0.0"
+    shebang-regex "^1.0.0"
 
-shebang-regex@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz#ae16f1644d873ecad843b0307b143362d4c42172"
-  integrity sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==
+shebang-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
+  integrity sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM=
 
 signal-exit@^3.0.2:
   version "3.0.3"
@@ -2865,7 +2865,7 @@ strip-ansi@^3.0.0:
   dependencies:
     ansi-regex "^2.0.0"
 
-strip-ansi@^5.1.0:
+strip-ansi@^5.1.0, strip-ansi@^5.2.0:
   version "5.2.0"
   resolved "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz#8c9a536feb6afc962bdfa5b104a5091c1ad9c0ae"
   integrity sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==
@@ -2879,7 +2879,7 @@ strip-ansi@^6.0.0:
   dependencies:
     ansi-regex "^5.0.0"
 
-strip-json-comments@^3.1.0:
+strip-json-comments@^3.0.1:
   version "3.1.0"
   resolved "https://registry.npmjs.org/strip-json-comments/-/strip-json-comments-3.1.0.tgz#7638d31422129ecf4457440009fba03f9f9ac180"
   integrity sha512-e6/d0eBu7gHtdCqFt0xJr642LdToM5/cN4Qb9DbHjVx1CP5RyeM+zH7pbecEmDv/lBqb0QH+6Uqq75rxFPkM0w==
@@ -3009,12 +3009,12 @@ tty-browserify@0.0.0:
   version "0.0.0"
   resolved "https://registry.yarnpkg.com/tty-browserify/-/tty-browserify-0.0.0.tgz#a157ba402da24e9bf957f9aa69d524eed42901a6"
 
-type-check@^0.4.0, type-check@~0.4.0:
-  version "0.4.0"
-  resolved "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz#07b8203bfa7056c0657050e3ccd2c37730bab8f1"
-  integrity sha512-XleUoc9uwGXqjWwXaUTZAmzMcFZ5858QA2vvx1Ur5xIcixXIP+8LnFDgRplU30us6teqdlskFfu+ae4K79Ooew==
+type-check@~0.3.2:
+  version "0.3.2"
+  resolved "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz#5884cab512cf1d355e3fb784f30804b2b520db72"
+  integrity sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=
   dependencies:
-    prelude-ls "^1.2.1"
+    prelude-ls "~1.1.2"
 
 type-fest@^0.11.0:
   version "0.11.0"
@@ -3196,14 +3196,14 @@ webpack@^4.43.0:
     watchpack "^1.6.1"
     webpack-sources "^1.4.1"
 
-which@^2.0.1:
-  version "2.0.2"
-  resolved "https://registry.npmjs.org/which/-/which-2.0.2.tgz#7c6a8dd0a636a0327e10b59c9286eee93f3f51b1"
-  integrity sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==
+which@^1.2.9:
+  version "1.3.1"
+  resolved "https://registry.npmjs.org/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
+  integrity sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==
   dependencies:
     isexe "^2.0.0"
 
-word-wrap@^1.2.3:
+word-wrap@~1.2.3:
   version "1.2.3"
   resolved "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz#610636f6b1f703891bd34771ccb17fb93b47079c"
   integrity sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ==
diff --git a/scripts/build.sh b/scripts/build.sh
index 51491da..a83dfc8 100644
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,3 +1,11 @@
+###
+ # @Description: 
+ # @Version: 2.0
+ # @Autor: mayako
+ # @Date: 2020-05-29 14:27:16
+ # @LastEditors: mayako
+ # @LastEditTime: 2020-06-28 14:44:04
+### 
 #! /bin/bash
 
 #cd path && install modules
@@ -10,7 +18,7 @@ install() {
 }
 . ~/.nvm/nvm.sh
 
-DEFAULT="12.0.0"
+DEFAULT="12.18.1"
 SELECT="webpack-3"
 if [ "$1" = "" ]
 then
@@ -26,25 +34,25 @@ cd env
 CRTDIR=$(pwd)
 for file in $(ls $CRTDIR); do
   if test -d $file; then
-    NV="8.10.0"
+    NV="8.17.0"
     case $file in
     "webpack-1")
-      NV="8.10.0"
+      NV="8.17.0"
       ;;
     "webpack-2")
-      NV="8.10.0"
+      NV="8.17.0"
       ;;
     "webpack-3")
-      NV="8.10.0"
+      NV="8.17.0"
       ;;
     "webpack-4")
-      NV="12.0.0"
+      NV="12.18.1"
       ;;
     "webpack-5")
-      NV="12.0.0"
+      NV="12.18.1"
       ;;
     *)
-      NV="8.10.0"
+      NV="8.17.0"
       ;;
     esac
     install $file $NV