fix(deps): update dependency @netlify/functions to ^0.8.0 (#747)

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

Author: renovate[bot]

package-lock.json

@@ -52,7 +52,7 @@
   },
   "homepage": "https://github.com/netlify/netlify-plugin-nextjs#readme",
   "dependencies": {
-    "@netlify/functions": "^0.7.2",
+    "@netlify/functions": "^0.8.0",
     "@netlify/ipx": "^0.0.7",
     "@vercel/node": "^1.11.2-canary.4",
     "chalk": "^4.1.2",