Added coverage reporting

Signed-off-by: Jaid <jaid.jsx@gmail.com>

Author: Jaid

package.json

@@ -11,7 +11,8 @@
     "extends": "jaid"
   },
   "jest": {
-    "testEnvironment": "node"
+    "testEnvironment": "node",
+    "coverageDirectory": "dist/jest/coverage"
   },
   "dependencies": {},
   "devDependencies": {
@@ -36,7 +37,8 @@
     "babel:test": "rimraf dist/src-transpiled/test && cross-env NODE_ENV=test babel --out-dir dist/src-transpiled/test src",
     "build:prod": "cross-env NODE_ENV=production webpack",
     "build:dev": "webpack",
-    "test": "npm run build:prod && cross-env NODE_ENV=production MAIN=dist/package/production jest --runInBand",
+    "test:prod": "npm run build:prod && cross-env NODE_ENV=production MAIN=dist/package/production jest --runInBand",
+    "test:coverage": "npm run test:dev -- --coverage --json --outputFile=dist/jest/stats.json",
     "test:dev": "cross-env NODE_ENV=test jest --runInBand",
     "test:debug": "cross-env DEBUG=\"$(basename $PWD),$(basename $PWD):*\" NODE_ENV=test node --inspect=9229 node_modules/jest/bin/jest.js --runInBand",
     "release": "npm run clean && npm test && cross-env git tag v$npm_package_version && git push --tags && cross-env opn https://github.com/$npm_package_author_name/$(basename $PWD)/releases/new?tag=v$npm_package_version"