Bump prettier from 1.17.1 to 1.18.0

Bumps [prettier](https://github.com/prettier/prettier) from 1.17.1 to 1.18.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.17.1...1.18.0)

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

Author: dependabot-preview[bot]

yarn.lock

@@ -3459,8 +3459,8 @@ prettier-linter-helpers@^1.0.0:
     fast-diff "^1.1.2"
 
 prettier@^1.7.4:
-  version "1.17.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.17.1.tgz#ed64b4e93e370cb8a25b9ef7fef3e4fd1c0995db"
+  version "1.18.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.0.tgz#d1701ca9b2941864b52f3262b35946d2c9cd88f0"
 
 pretty-format@^24.8.0:
   version "24.8.0"