chore: upgrade husky config to v6 (#1204)

Author: jvarho

Diff for: .husky/.gitignore

@@ -0,0 +1 @@
+_

Diff for: .husky/pre-commit

@@ -0,0 +1,4 @@
+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+yarn lint-staged

Diff for: package.json

@@ -14,6 +14,7 @@
     "api gateway"
   ],
   "scripts": {
+    "prepare": "husky install",
     "test": "jest --runInBand --coverage",
     "packages-install": "lerna exec -- yarn install --frozen-lockfile",
     "packages-build": "lerna run build",
@@ -122,11 +123,6 @@
     "type": "opencollective",
     "url": "https://opencollective.com/serverless-nextjs-plugin"
   },
-  "husky": {
-    "hooks": {
-      "pre-commit": "yarn lint-staged"
-    }
-  },
   "lint-staged": {
     "*.{js,jsx,ts,tsx,md,yml}": [
       "prettier --write"