build(deps-dev): bump prettier from 1.16.3 to 1.16.4

Bumps [prettier](https://github.com/prettier/prettier) from 1.16.3 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@1.16.3...1.16.4)

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

yarn.lock

@@ -687,8 +687,8 @@ prettier-linter-helpers@^1.0.0:
     fast-diff "^1.1.2"
 
 prettier@^1.15.3:
-  version "1.16.3"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.16.3.tgz#8c62168453badef702f34b45b6ee899574a6a65d"
+  version "1.16.4"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.16.4.tgz#73e37e73e018ad2db9c76742e2647e21790c9717"
 
 progress@^2.0.0:
   version "2.0.0"