Bump prettier from 1.14.3 to 1.15.0

Bumps [prettier](https://github.com/prettier/prettier) from 1.14.3 to 1.15.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/1.14.3...1.15.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package-lock.json

@@ -6768,9 +6768,9 @@
       "dev": true
     },
     "prettier": {
-      "version": "1.14.3",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.14.3.tgz",
-      "integrity": "sha512-qZDVnCrnpsRJJq5nSsiHCE3BYMED2OtsI+cmzIzF1QIfqm5ALf8tEJcO27zV1gKNKRPdhjO0dNWnrzssDQ1tFg==",
+      "version": "1.15.0",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-1.15.0.tgz",
+      "integrity": "sha512-NtSOnDRmJaNuruoX0KhDdQ3UGyLNJaSuP2eJn6Q6uSvzQBAJQHZbXgraFPbv8sYbNaMR9nz7scMy55WC+78E6w==",
       "dev": true
     },
     "prettier-linter-helpers": {

package.json

@@ -48,7 +48,7 @@
     "mocha": "^5.2.0",
     "mocha-webpack": "^2.0.0-beta.0",
     "node-sass": "^4.10.0",
-    "prettier": "1.14.3",
+    "prettier": "1.15.0",
     "sass-loader": "^7.0.3",
     "sinon": "^7.1.1",
     "url-loader": "^1.1.2",