pre-commit hook: version up and python3 support

.husky/.gitignore

+_

.husky/pre-commit

+#!/bin/sh
+. "$(dirname "$0")/_/husky.sh"
+
+npx lint-staged

package.json

 {
-  "dependencies": {
-    "husky": "^1.1.2",
-    "lint-staged": "^7.3.0"
-  },
   "lint-staged": {
     "*.json": [
-      "python2 ./format-json",
-      "git add"
+      "./format-json"
     ],
     "{component,software,stack}/**": [
-      "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"python2\", \"./update-hash\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'",
+      "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"./update-hash\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'",
       "python -c 'import sys, os.path, subprocess; [subprocess.check_call((\"git\", \"add\", buildout_hash)) for buildout_hash in { os.path.join(os.path.dirname(staged), \"buildout.hash.cfg\") for staged in sys.argv[1:]} if os.path.exists(buildout_hash)]'"
     ]
   },
-  "husky": {
-    "hooks": {
-      "pre-commit": "lint-staged"
-    }
+  "devDependencies": {
+    "husky": "^7.0.0",
+    "lint-staged": "^12.1.2"
+  },
+  "scripts": {
+    "prepare": "husky install"
   }
 }