📝 docs: update README

closes #3

Author: kazupon

README.md

@@ -1,13 +1,53 @@
 # :globe_with_meridians: vue-i18n-jest
 
-
 [![npm](https://img.shields.io/npm/v/vue-i18n-jest.svg)](https://www.npmjs.com/package/vue-i18n-jest)
 [![CircleCI](https://circleci.com/gh/kazupon/vue-i18n-jest/tree/master.svg?style=svg)](https://circleci.com/gh/kazupon/vue-i18n-jest/tree/master)
 [![codecov](https://codecov.io/gh/kazupon/vue-i18n-jest/branch/master/graph/badge.svg)](https://codecov.io/gh/kazupon/vue-i18n-jest)
 
 vue-jest wrapper for i18n custom blocks
 
-:warning: WIP
+## :cd: Installation
+
+### npm
+
+```sh
+npm install --save-dev vue-i18n-jest
+```
+
+### yarn
+
+```sh
+yarn add -D vue-i18n-jest
+```
+
+## :rocket: Usages
+
+To define vue-i18n-jest as a transformer for your .vue files that have i18n custom blocks, map them to the vue-i18n-jest module.
+
+if you've already setup vue-jest, You can change it as follows:
+
+```diff
+{
+  "jest": {
+    // ...
+    "transform": {
+-     "^.+\\.vue$": "vue-jest"
++     "^.+\\.vue$": "vue-i18n-jest"
+    },
+    // ....
+}
+```
+
+
+## :scroll: Changelog
+Details changes for each release are documented in the [CHANGELOG.md](https://github.com/kazupon/vue-i18n-jest/blob/master/CHANGELOG.md).
+
+
+## :exclamation: Issues
+Please make sure to read the [Issue Reporting Checklist](https://github.com/kazupon/vue-i18n-jest/blob/master/.github/CONTRIBUTING.md#issue-reporting-guidelines) before opening an issue. Issues not conforming to the guidelines may be closed immediately.
+
+## :white_check_mark: TODO
+Managed with [GitHub Projects](https://github.com/kazupon/vue-i18n-jest/issues?q=is%3Aissue+is%3Aopen+label%3ATODO)
 
 ## :copyright: License