Upgrade prettier to 1.15.2

package.json

@@ -139,7 +139,7 @@
     "karma-sourcemap-loader": "^0.3.7",
     "karma-webpack": "^4.0.0-beta.0",
     "nodemon": "^1.18.4",
-    "prettier": "1.14.3",
+    "prettier": "1.15.2",
     "webpack-dev-server": "^3.1.8"
   }
 }

yarn.lock

@@ -6415,10 +6415,10 @@ prettier@1.13.7:
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.7.tgz#850f3b8af784a49a6ea2d2eaa7ed1428a34b7281"
   integrity sha512-KIU72UmYPGk4MujZGYMFwinB7lOf2LsDNGSOC8ufevsrPLISrZbNJlWstRi3m0AMuszbH+EFSQ/r6w56RSPK6w==
-prettier@1.14.3:
-  version "1.14.3"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.14.3.tgz#90238dd4c0684b7edce5f83b0fb7328e48bd0895"
-  integrity sha512-qZDVnCrnpsRJJq5nSsiHCE3BYMED2OtsI+cmzIzF1QIfqm5ALf8tEJcO27zV1gKNKRPdhjO0dNWnrzssDQ1tFg==
+prettier@1.15.2:
+  version "1.15.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.15.2.tgz#d31abe22afa4351efa14c7f8b94b58bb7452205e"
+  integrity sha512-YgPLFFA0CdKL4Eg2IHtUSjzj/BWgszDHiNQAe0VAIBse34148whfdzLagRL+QiKS+YfK5ftB6X4v/MBw8yCoug==
 prismjs@^1.6.0:
   version "1.6.0"