Collect coverage also from src folder

Author: javierbrea

jest.config.js

@@ -9,7 +9,7 @@ module.exports = {
   collectCoverage: true,
 
   // An array of glob patterns indicating a set of files for which coverage information should be collected
-  collectCoverageFrom: ["index.js", "src"],
+  collectCoverageFrom: ["index.js", "src/**"],
 
   // The directory where Jest should output its coverage files
   coverageDirectory: "coverage",