Update dependency prettier to v1.18.1

Author: renovate-bot

package.json

@@ -16,6 +16,6 @@
     "babel-eslint": "10.0.1",
     "eslint": "5.13.0",
     "eslint-plugin-prettier": "3.0.1",
-    "prettier": "1.16.3"
+    "prettier": "1.18.1"
   }
 }

yarn.lock

@@ -2461,9 +2461,10 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@1.16.3:
-  version "1.16.3"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.16.3.tgz#8c62168453badef702f34b45b6ee899574a6a65d"
+prettier@1.18.1:
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.1.tgz#2c79bdc97cbd457fc56e2f37c91cf076d69a8e07"
+  integrity sha512-cO2Lm9UuFJHhNgHSChbFddQEzNPP+sA6fX1tGmC0VNqTc2X+7EH0gpGWdEX0HfCe5+NVyOyyyWUpLKsb8LU5vg==
 
 process-nextick-args@~2.0.0:
   version "2.0.0"