diff --git a/package-lock.json b/package-lock.json
index 0873de6..61b8377 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3386,7 +3386,8 @@
                 },
                 "ansi-regex": {
                     "version": "2.1.1",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "aproba": {
                     "version": "1.2.0",
@@ -3404,11 +3405,13 @@
                 },
                 "balanced-match": {
                     "version": "1.0.0",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "brace-expansion": {
                     "version": "1.1.11",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "balanced-match": "^1.0.0",
                         "concat-map": "0.0.1"
@@ -3421,15 +3424,18 @@
                 },
                 "code-point-at": {
                     "version": "1.1.0",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "concat-map": {
                     "version": "0.0.1",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "console-control-strings": {
                     "version": "1.1.0",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "core-util-is": {
                     "version": "1.0.2",
@@ -3532,7 +3538,8 @@
                 },
                 "inherits": {
                     "version": "2.0.4",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "ini": {
                     "version": "1.3.5",
@@ -3542,6 +3549,7 @@
                 "is-fullwidth-code-point": {
                     "version": "1.0.0",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "number-is-nan": "^1.0.0"
                     }
@@ -3554,17 +3562,20 @@
                 "minimatch": {
                     "version": "3.0.4",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "brace-expansion": "^1.1.7"
                     }
                 },
                 "minimist": {
                     "version": "1.2.5",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "minipass": {
                     "version": "2.9.0",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "safe-buffer": "^5.1.2",
                         "yallist": "^3.0.0"
@@ -3581,6 +3592,7 @@
                 "mkdirp": {
                     "version": "0.5.3",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "minimist": "^1.2.5"
                     }
@@ -3636,7 +3648,8 @@
                 },
                 "npm-normalize-package-bin": {
                     "version": "1.0.1",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "npm-packlist": {
                     "version": "1.4.8",
@@ -3661,7 +3674,8 @@
                 },
                 "number-is-nan": {
                     "version": "1.0.1",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "object-assign": {
                     "version": "4.1.1",
@@ -3671,6 +3685,7 @@
                 "once": {
                     "version": "1.4.0",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "wrappy": "1"
                     }
@@ -3739,7 +3754,8 @@
                 },
                 "safe-buffer": {
                     "version": "5.1.2",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "safer-buffer": {
                     "version": "2.1.2",
@@ -3769,6 +3785,7 @@
                 "string-width": {
                     "version": "1.0.2",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "code-point-at": "^1.0.0",
                         "is-fullwidth-code-point": "^1.0.0",
@@ -3786,6 +3803,7 @@
                 "strip-ansi": {
                     "version": "3.0.1",
                     "bundled": true,
+                    "optional": true,
                     "requires": {
                         "ansi-regex": "^2.0.0"
                     }
@@ -3824,11 +3842,13 @@
                 },
                 "wrappy": {
                     "version": "1.0.2",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 },
                 "yallist": {
                     "version": "3.1.1",
-                    "bundled": true
+                    "bundled": true,
+                    "optional": true
                 }
             }
         },
@@ -6210,9 +6230,9 @@
             "integrity": "sha512-4WK/bYZmj8xLr+HUCODHGF1ZFzsYffasLUgEiMBY4fgtltdO6B4WJtlSbPaDTLpYTcGVwM2qLnFTICEcNxs3kA=="
         },
         "terser": {
-            "version": "4.6.10",
-            "resolved": "https://registry.npmjs.org/terser/-/terser-4.6.10.tgz",
-            "integrity": "sha512-qbF/3UOo11Hggsbsqm2hPa6+L4w7bkr+09FNseEe8xrcVD3APGLFqE+Oz1ZKAxjYnFsj80rLOfgAtJ0LNJjtTA==",
+            "version": "4.8.1",
+            "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.1.tgz",
+            "integrity": "sha512-4GnLC0x667eJG0ewJTa6z/yXrbLGv80D9Ru6HIpCQmO+Q4PfEtBFi0ObSckqwL6VyQv/7ENJieXHo2ANmdQwgw==",
             "requires": {
                 "commander": "^2.20.0",
                 "source-map": "~0.6.1",