Add pre-commit tooling and Git hooks

Author: hassankhan

.eslintrc

@@ -10,6 +10,7 @@ extends:
   - plugin:promise/recommended
   - plugin:import/errors
   - plugin:import/warnings
+  - prettier
 parser: babel-eslint
 parserOptions:
   sourceType: module

.huskyrc

@@ -0,0 +1,5 @@
+{
+  "hooks": {
+    "pre-commit": "lint-staged"
+  }
+}

.lintstagedrc.yml

@@ -0,0 +1,6 @@
+linters:
+  "*.js":
+    - "eslint --fix"                        # Run TSLint
+    - "prettier --write"                    # Run Prettier
+    - "npm test"                            # Run tests
+    - "git add"