chore(deps-dev): Bump prettier from 1.19.1 to 2.1.2

Bumps [prettier](https://github.com/prettier/prettier) from 1.19.1 to 2.1.2.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](prettier/prettier@1.19.1...2.1.2)

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

Author: dependabot-preview[bot]

package.json

@@ -45,7 +45,7 @@
   },
   "devDependencies": {
     "eslint": "^5.16.0",
-    "prettier": "^1",
+    "prettier": "^2",
     "cross-spawn": "*",
     "tape": "*",
     "tape-promise": "*",