Switch from pre-commit to husky.

Author: trekhleb

.huskyrc.json

@@ -0,0 +1,5 @@
+{
+  "hooks": {
+    "pre-commit": "npm run lint && npm run test"
+  }
+}

package-lock.json

@@ -8,10 +8,6 @@
     "test": "jest",
     "ci": "npm run lint && npm run test -- --coverage"
   },
-  "pre-commit": [
-    "lint",
-    "test"
-  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/trekhleb/javascript-algorithms.git"
@@ -46,8 +42,8 @@
     "eslint-plugin-jest": "^22.3.0",
     "eslint-plugin-jsx-a11y": "^6.2.1",
     "eslint-plugin-react": "^7.12.4",
-    "jest": "^24.3.1",
-    "pre-commit": "^1.2.2"
+    "husky": "^1.3.1",
+    "jest": "^24.3.1"
   },
   "dependencies": {}
 }