title: Not able to collect coverage in Jest
body: <p>I am using JEST to unit test my app. The test execution is running fine. However I am not able to collect code coverage correctly. The coverage is only logged for folder where I have the jest config file. Snapshot of folder structure:</p>
  
  <p><a href="https://i.stack.imgur.com/jugfK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jugfK.png" alt="enter image description here"></a></p>
  
  <p>In the console the coverage is only generated for enzyme-config.js. I tried using <code>"collectCoverageFrom" : ["**/src/**/*.js"]</code> but it throws me Unknown for all params. Am I missing something here?</p>
  
  <p>jest-setup.json:</p>
  
  <pre><code>{
      "testEnvironment": "jsdom",
      "setupTestFrameworkScriptFile": "./enzyme.setup.js",
      "testResultsProcessor": "jest-teamcity-reporter",
      "coverageReporters": [
          "teamcity", "lcov", "text"
     ],
     "collectCoverageFrom" : ["**/src/**/*.js"],
      "roots": [
        "../../../__tests__/unit"
      ]
  }
  </code></pre>
  
  <p>Coverage log:</p>
  
  <p><a href="https://i.stack.imgur.com/wEA8q.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wEA8q.png" alt="enter image description here"></a></p>