Feat: Support macOS and Windows, migrate JavaScript to TypeScript (#32)

- Support macOS and Windows (Close #24 )
- Refactoring
  - Error handling
  - TypeScript
- Prettier (Close #29 )
- GHA: Add upload-artifact step for test coverage
- deps: Install husky

package.json

@@ -4,9 +4,13 @@
   "description": "Hugo setup action",
   "main": "lib/index.js",
   "scripts": {
-    "lint": "eslint ./lib/**/*",
-    "test": "jest",
-    "build": "npm prune --production"
+    "lint": "eslint ./src/**/*.ts",
+    "lint:fix": "eslint --fix ./src/**/*.ts",
+    "test": "jest --coverage --verbose",
+    "build": "npm prune --production",
+    "tsc": "tsc",
+    "format": "prettier --write **/*.ts",
+    "format:check": "prettier --check **/*.ts"
   },
   "repository": {
     "type": "git",
@@ -32,7 +36,22 @@
     "xmlhttprequest": "^1.8.0"
   },
   "devDependencies": {
+    "@types/jest": "^24.0.18",
+    "@types/node": "^12.7.5",
+    "@typescript-eslint/parser": "^2.3.0",
     "eslint": "^6.4.0",
-    "jest": "^24.9.0"
+    "husky": "^3.0.5",
+    "jest": "^24.9.0",
+    "jest-circus": "^24.9.0",
+    "prettier": "1.18.2",
+    "ts-jest": "^24.1.0",
+    "typescript": "^3.6.3"
+  },
+  "husky": {
+    "skipCI": true,
+    "hooks": {
+      "pre-commit": "npm run tsc && npm run format",
+      "post-commit": "npm run build && git add node_modules/* && git commit -m \"deps: Husky commit correct node modules\""
+    }
   }
 }