package.json: update husky configuration

package.json

@@ -9,12 +9,16 @@
     "husky": "1.3.1"
   },
   "scripts": {
-    "precommit": "npm test",
     "lint-markdown": "markdownlint pages/**/*.md",
     "lint-tldr": "tldr-lint ./pages",
     "test": "bash -c 'markdownlint pages/ && tldr-lint ./pages 2>&1 | tee test_result; test ${PIPESTATUS[0]} -eq 0'",
     "build-index": "node ./scripts/build-index.js | tee pages/index.json > index.json"
   },
+  "husky": {
+    "hooks": {
+      "pre-commit": "npm test"
+    }
+  },
   "repository": "tldr-pages/tldr",
   "author": "Romain Prieto",
   "private": true,