Add configurable test timeouts

[corymharper]

This pull request adds configurable timeouts with an initial timeout of the test command for thirty seconds.

Closes #61

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 93.96%. Comparing base (f649bbd) to head (fad09ea).
⚠️ Report is 192 commits behind head on master.

Files with missing lines	Patch %	Lines
src/utils/get-config.ts	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #73      +/-   ##
==========================================
- Coverage   94.16%   93.96%   -0.20%     
==========================================
  Files          12       12              
  Lines         394      398       +4     
  Branches       65       64       -1     
==========================================
+ Hits          371      374       +3     
- Misses         23       24       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.