test: add entry in package.json to combine calls of lint & prettier

Author: ctschacher

test/e2e/lib/package.json

@@ -16,6 +16,7 @@
     "lint:fix": "eslint . --fix",
     "format": "prettier --write .",
     "format:check": "prettier --check .",
+    "lint-format": "yarn lint:fix && yarn format",
     "phelp": "prettier --check --help"
   },
   "prettier": {