chore(deps): update dependency prettier to v1.15.2 (#467)

Author: renovate[bot]

package.json

@@ -57,7 +57,7 @@
     "gh-pages": "2.0.0",
     "light-ts-loader": "1.1.2",
     "npm-run-all": "4.1.3",
-    "prettier": "1.15.1",
+    "prettier": "1.15.2",
     "react": "16.4.2",
     "react-dom": "16.4.2",
     "react-test-renderer": "16.4.2",

yarn.lock

@@ -6320,9 +6320,9 @@ preserve@^0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
-prettier@1.15.1:
-  version "1.15.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.15.1.tgz#06c67106afb1b40e74b002353b2079cc7e0e67bf"
+prettier@1.15.2:
+  version "1.15.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.15.2.tgz#d31abe22afa4351efa14c7f8b94b58bb7452205e"
 
 pretty-bytes@^1.0.2:
   version "1.0.4"