chore: update dependency eslint to v4.13.0

Author: renovate[bot]

package.json

@@ -89,7 +89,7 @@
   },
   "devDependencies": {
     "docsify-cli": "4.1.12",
-    "eslint": "4.12.1",
+    "eslint": "4.13.0",
     "eslint-config-prettier": "2.9.0",
     "husky": "0.14.3",
     "lerna": "2.5.1",

yarn.lock

@@ -2559,9 +2559,9 @@ eslint-scope@^3.7.1:
     esrecurse "^4.1.0"
     estraverse "^4.1.1"
 
-eslint@4.12.1:
-  version "4.12.1"
-  resolved "https://registry.npmjs.org/eslint/-/eslint-4.12.1.tgz#5ec1973822b4a066b353770c3c6d69a2a188e880"
+eslint@4.13.0:
+  version "4.13.0"
+  resolved "https://registry.npmjs.org/eslint/-/eslint-4.13.0.tgz#1991aa359586af83877bde59de9d41f53e20826d"
   dependencies:
     ajv "^5.3.0"
     babel-code-frame "^6.22.0"