feat: add pre commit hooks (#3)

* test pre commit

* chore: remove prettify script in favor of pre commit hook

Author: JadTermsani

Diff for: package.json

@@ -7,10 +7,9 @@
   "license": "MIT",
   "scripts": {
     "build": "tsc",
-    "lint": "eslint ./src --ext .ts,.js",
+    "lint": "eslint ./src --ext .ts,.js --fix",
     "test": "jest",
     "test:watch": "jest --watchAll",
-    "prettify": "prettier --write ./src/**/*.{ts,js}",
     "ts-node": "ts-node",
     "nodemon": "nodemon"
   },
@@ -31,11 +30,26 @@
     "eslint-plugin-jsx-a11y": "^6.2.1",
     "eslint-plugin-prettier": "^3.0.1",
     "eslint-plugin-react": "^7.12.4",
+    "husky": "^1.3.1",
     "jest": "^24.1.0",
+    "lint-staged": "^8.1.4",
     "nodemon": "^1.18.9",
     "prettier": "^1.16.4",
+    "pretty-quick": "^1.10.0",
     "ts-jest": "^23.10.5",
     "ts-node": "^8.0.2",
     "typescript": "^3.3.1"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "lint-staged"
+    }
+  },
+  "lint-staged": {
+    "*.{js,ts}": [
+      "eslint ./src --ext .ts,.js --fix",
+      "pretty-quick",
+      "git add"
+    ]
   }
 }

Diff for: src/index.test.ts

@@ -1,5 +1,5 @@
 import add from './index';
 
 test('basic test', () => {
-  expect(add(2, 4)).toBe(6);
+  expect(add(2, 4, 6)).toBe(12);
 });

Diff for: src/index.ts

@@ -1,3 +1,3 @@
-export default function add(x: number, y: number): number {
-  return x + y;
+export default function add(x: number, y: number, z: number): number {
+  return x + y + z;
 }