Update dependency prettier to v2 (#363)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package-lock.json

@@ -32,7 +32,7 @@
         "husky": "4.2.3",
         "jest": "24.9.0",
         "lint-staged": "10.1.0",
-        "prettier": "1.19.1",
+        "prettier": "2.0.2",
         "strip-ansi": "6.0.0"
     },
     "homepage": "https://github.com/typescript-eslint/tslint-to-eslint-config#readme",