feat: support tabs (#23)

* chore: bump up package-lock.json

* feat: support tabs. escape/unescape \t and \n

* refactor: carve out escaping bracket logic to a function

* chore(eslint): disable no-template-curly-in-string

* style: prettier

* build: add package-lock.json to bumpFiles

* feat: revert textarea to input

* feat: add margin to the heading

* deps: install and setup jest

* test: add tests for util

* feat: add description about \n and \t

.eslintrc.js

@@ -1,8 +1,11 @@
 module.exports = {
   extends: "@cybozu/eslint-config/presets/react-typescript-prettier",
   settings: {
-    "react": {
-      "version": "detect"
+    react: {
+      version: "detect"
     }
+  },
+  rules: {
+    "no-template-curly-in-string": 0
   }
-}
+};

.versionrc.js

@@ -7,6 +7,10 @@ module.exports = {
     {
       filename: "dist/manifest.json",
       type: "json"
+    },
+    {
+      filename: "package-lock.json",
+      type: "json"
     }
   ]
 };

jest.config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  preset: "ts-jest"
+};