codecov integration

.github/workflows/test.yml

@@ -32,3 +32,5 @@ jobs:
       run: npm run build
     - name: Test
       run: npm run test
+    - name: Upload Coverage
+      uses: codecov/codecov-action@v1

README.md

@@ -2,6 +2,7 @@
 **Strongly-typed official Misskey SDK for browsers/Node.js.**
 
 [![Test](https://github.com/misskey-dev/misskey.js/actions/workflows/test.yml/badge.svg)](https://github.com/misskey-dev/misskey.js/actions/workflows/test.yml)
+[![codecov](https://codecov.io/gh/misskey-dev/misskey.js/branch/develop/graph/badge.svg?token=PbrTtk3nVD)](https://codecov.io/gh/misskey-dev/misskey.js)
 
 [![NPM](https://nodei.co/npm/misskey-js.png?downloads=true&downloadRank=true&stars=true)](https://www.npmjs.com/package/misskey-js)
 

codecov.yml

@@ -0,0 +1,2 @@
+codecov:
+  token: d55e1270-f20a-4727-aa05-2bd57793315a

package.json

@@ -8,7 +8,7 @@
 		"build": "npm run tsc",
 		"tsc": "tsc",
 		"tsd": "tsd",
-		"jest": "jest --detectOpenHandles",
+		"jest": "jest --coverage --detectOpenHandles",
 		"test": "npm run jest && npm run tsd"
 	},
 	"repository": {