message: Update Travis CI performance troubleshooting
  Fixes
diff: @@ -97,7 +97,7 @@ npm test -- --runInBand
  ```
  Another alternative to expediting test execution time on Continuous Integration Servers such as Travis-CI is to set the max
  -worker pool to ~_4_. Specifically on Travis-CI, this can reduce test execution time in half.
  +worker pool to ~_4_. Specifically on Travis-CI, this can reduce test execution time in half. Note: The Travis CI _free_ plan available for open source projects only includes 2 CPU cores.
  ```bash
  # Using Jest CLI
  