🤖 config(travis): Lint config in script.

These changes were automatically generated by a transform whose code can be found at:
  - https://github.com/make-github-pseudonymous-again/rejuvenate/blob/b30cf223897adb74ca4a854799d50b21d7e1959d/src/transforms/travis:add-lint-config-to-script.js
Please contact the author of the transform if you believe there was an error.

package.json

@@ -60,7 +60,7 @@
     "prepublishOnly": "pinst --disable",
     "release": "np --message ':hatching_chick: release: Bumping to v%s.'",
     "test": "ava",
-    "travis": "npm run lint && npm run cover"
+    "travis": "npm run lint-config && npm run lint && npm run cover"
   },
   "dependencies": {
     "@aureooms/js-error": "^5.0.0"