Update dependency prettier to v1.19.1

Author: renovate-bot

package.json

@@ -44,6 +44,6 @@
     "husky": "^2.0.0",
     "jest": "^23.5.0",
     "lint-staged": "^7.2.0",
-    "prettier": "1.15.2"
+    "prettier": "1.19.1"
   }
 }

yarn.lock

@@ -2816,9 +2816,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.15.2:
-  version "1.15.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.15.2.tgz#d31abe22afa4351efa14c7f8b94b58bb7452205e"
+prettier@1.19.1:
+  version "1.19.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
 
 pretty-format@^23.2.0:
   version "23.2.0"