fix(deps): update dependency @netlify/config to v5 (#83)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -29,7 +29,7 @@
   "author": "Netlify",
   "license": "MIT",
   "dependencies": {
-    "@netlify/config": "^4.3.0",
+    "@netlify/config": "^5.0.0",
     "lodash.isplainobject": "^4.0.6"
   },
   "devDependencies": {