chore: update dependency husky to v8 (#343)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -2,7 +2,7 @@
   "name": "flutter_gen",
   "author": "wasabeef",
   "devDependencies": {
-    "husky": "7.0.4"
+    "husky": "8.0.3"
   },
   "scripts": {
     "prepare": "husky install"