Don't depend on jest exit code

Changed script to execute independently of jest error code.
Looks like jest returns exit code 1 if coverage is under the defined goal when running in npm scripts: jestjs/jest#3520

README.md

@@ -147,7 +147,7 @@ npm run test-with-coverage
 
 ```json
 "scripts": {
-  "test-with-coverage": "jest --coverage && cat ./coverage/lcov.info | codacy-coverage"
+  "test-with-coverage": "jest --coverage || cat ./coverage/lcov.info | codacy-coverage"
 }
 ```