パッケージをアップデート, TypeScript 関連のパッケージを追加

.babelrc

@@ -1,14 +1,17 @@
 {
   "presets": [
     [
-      "env",
-      {
-        "targets": {
-          "ie": 11
-        },
-        // 必要な分だけのpolyfillを自動でインポート
-        "useBuiltIns": "usage"
-      }
-    ]
+        "@babel/preset-env",
+        {
+            "targets": {
+                "node": "current",
+                "ie": 11
+            },
+            // 必要な分だけのpolyfillを自動でインポート
+            "useBuiltIns": "usage",
+            "corejs": 2
+        }
+    ],
+    "@babel/preset-typescript"
   ]
 }

.editorconfig

@@ -12,7 +12,7 @@ trim_trailing_whitespace = true
 indent_style = space
 indent_size = 4
 
-[*.{yml,yaml,json,js}]
+[*.{yml,yaml,json,js,ts}]
 indent_style = space
 indent_size = 2
 

.eslintrc.json

@@ -7,6 +7,19 @@
    "plugins": [
     "import"
   ],
-  "parser": "babel-eslint",
-  "extends": "jquery"
+  "parser": "@typescript-eslint/parser",
+  "extends": [
+    "plugin:@typescript-eslint/recommended",
+    "plugin:prettier/recommended",
+    "prettier/@typescript-eslint",
+    "jquery"
+  ],
+  "rules": {
+    "prettier/prettier": [
+      "error",
+      {
+        "singleQuote": true
+      }
+    ]
+  }
 }