Bump prettier from 1.12.1 to 1.17.0 (#86)

Bumps [prettier](https://github.com/prettier/prettier) from 1.12.1 to 1.17.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.12.1...1.17.0)

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

Author: dependabot[bot]

yarn.lock

@@ -3351,8 +3351,8 @@ preserve@^0.2.0:
   resolved "https://registry.yarnpkg.com/preserve/-/preserve-0.2.0.tgz#815ed1f6ebc65926f865b310c0713bcb3315ce4b"
 
 prettier@^1.12.1:
-  version "1.12.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.12.1.tgz#c1ad20e803e7749faf905a409d2367e06bbe7325"
+  version "1.17.0"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.17.0.tgz#53b303676eed22cc14a9f0cec09b477b3026c008"
 
 pretty-format@^22.4.3:
   version "22.4.3"