Update dependency prettier to ^1.19.1

Author: renovate-bot

package.json

@@ -53,7 +53,7 @@
     "lint-staged": "^7.0.4",
     "mocha": "^5.0.5",
     "power-assert": "^1.5.0",
-    "prettier": "^1.12.0",
+    "prettier": "^1.19.1",
     "prettier-eslint": "^8.8.1",
     "prettier-eslint-cli": "^4.7.1",
     "ts-jest": "^24.0.1",

yarn.lock

@@ -3859,7 +3859,12 @@ prettier-eslint@^8.5.0, prettier-eslint@^8.8.1:
     typescript-eslint-parser "^16.0.0"
     vue-eslint-parser "^2.0.2"
 
-prettier@^1.12.0, prettier@^1.7.0:
+prettier@^1.19.1:
+  version "1.19.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
+  integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
+
+prettier@^1.7.0:
   version "1.16.4"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.16.4.tgz#73e37e73e018ad2db9c76742e2647e21790c9717"