Update markdownlint-cli to the latest version 🚀 (#54)

* chore(package): update markdownlint-cli to version 0.12.0

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

package.json

@@ -60,7 +60,7 @@
     "chai": "^4.1.2",
     "codecov": "^3.0.0",
     "cross-env": "^5.1.0",
-    "markdownlint-cli": "^0.11.0",
+    "markdownlint-cli": "^0.12.0",
     "mocha": "^5.0.0",
     "nyc": "^12.0.2",
     "snazzy": "^7.0.0",

yarn.lock

@@ -2652,19 +2652,19 @@ map-visit@^1.0.0:
   dependencies:
     object-visit "^1.0.0"
 
-[email protected].1:
-  version "8.4.1"
-  resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-8.4.1.tgz#206fe59b0e4e1b78a7c73250af9b34a4ad0aaf44"
+[email protected].2:
+  version "8.4.2"
+  resolved "https://registry.yarnpkg.com/markdown-it/-/markdown-it-8.4.2.tgz#386f98998dc15a37722aa7722084f4020bdd9b54"
   dependencies:
     argparse "^1.0.7"
     entities "~1.1.1"
     linkify-it "^2.0.0"
     mdurl "^1.0.1"
     uc.micro "^1.0.5"
 
-markdownlint-cli@^0.11.0:
-  version "0.11.0"
-  resolved "https://registry.yarnpkg.com/markdownlint-cli/-/markdownlint-cli-0.11.0.tgz#ba9ee55b7067e6c1c25f7e31cd171d03bc4830f5"
+markdownlint-cli@^0.12.0:
+  version "0.12.0"
+  resolved "https://registry.yarnpkg.com/markdownlint-cli/-/markdownlint-cli-0.12.0.tgz#14db32e28be098a0963c91e547f8adb58efdb158"
   dependencies:
     commander "~2.9.0"
     deep-extend "~0.5.1"
@@ -2673,14 +2673,14 @@ markdownlint-cli@^0.11.0:
     js-yaml "~3.11.0"
     lodash.differencewith "~4.5.0"
     lodash.flatten "~4.4.0"
-    markdownlint "~0.10.0"
+    markdownlint "~0.11.0"
     rc "~1.2.7"
 
-markdownlint@~0.10.0:
-  version "0.10.0"
-  resolved "https://registry.yarnpkg.com/markdownlint/-/markdownlint-0.10.0.tgz#ee941ee943f78ff6adbc1ff0fad49365e600b664"
+markdownlint@~0.11.0:
+  version "0.11.0"
+  resolved "https://registry.yarnpkg.com/markdownlint/-/markdownlint-0.11.0.tgz#3858bbdbc1ab78abf0c098d841c72b63dd3206a0"
   dependencies:
-    markdown-it "8.4.1"
+    markdown-it "8.4.2"
 
 math-random@^1.0.1:
   version "1.0.1"