🤖 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/457d6d9bfb7d08d917f0c3a95108832fc88fe176/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

@@ -55,7 +55,7 @@
     "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": {
     "@functional-data-structure/persistent-stack": "^1.0.0"