test: add coverage cmd

Author: Bieber

.gitpod.yml

@@ -0,0 +1,8 @@
+# This configuration file was automatically generated by Gitpod.
+# Please adjust to your needs (see https://www.gitpod.io/docs/config-gitpod-file)
+# and commit this file to your remote git repository to share the goodness with others.
+
+tasks:
+  - init: yarn install && yarn run build
+
+

package.json

@@ -5,6 +5,7 @@
   "main": "./es/index.js",
   "scripts": {
     "test": "jest",
+    "test:coverage": "jest --coverage",
     "build": "yarn clean && tsc -p tsconfig.build.json && webpack",
     "release": "yarn build && standard-version",
     "clean": "rm -rf ./es/*",