Bump prettier from 1.14.0 to 1.16.4

Bumps [prettier](https://github.com/prettier/prettier) from 1.14.0 to 1.16.4.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.14.0...1.16.4)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package-lock.json

@@ -73,7 +73,7 @@
         "gulp-rename": "^1.4.0",
         "gulp-rigger": "^0.5.8",
         "gulp-uglify": "^3.0.1",
-        "prettier": "1.14.0"
+        "prettier": "1.16.4"
     },
     "dependencies": {
         "bignumber.js": "^7.2.1"