Bump prettier from 1.13.4 to 1.13.6

Bumps [prettier](https://github.com/prettier/prettier) from 1.13.4 to 1.13.6.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.13.4...1.13.6)

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

yarn.lock

@@ -3918,8 +3918,8 @@ preserve@^0.2.0:
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
 prettier@^1.13.0:
-  version "1.13.4"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.4.tgz#31bbae6990f13b1093187c731766a14036fa72e6"
+  version "1.13.6"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.13.6.tgz#00ae0b777ad92f81a9e7a1df2f0470b6dab0cb44"
 
 pretty-format@^23.2.0:
   version "23.2.0"