fix(core-tester-cli): pass the base flags for programmatic calls

[faustbrian]

Proposed changes

Resolves #2094

Types of changes

• Bugfix (non-breaking change which fixes an issue)

Checklist

• I have read the CONTRIBUTING documentation
• Lint and unit tests pass locally with my changes

[ghost]

@air1one @supaiku0 - please review this in the next few days. Be sure to explicitly select labels so I know what's going on.

If no reviewer appears after a week, a reminder will be sent out.

[ghost]

@faustbrian The ci/circleci: test-node11-2 job is failing as of 626bf36525d9c86988713234d948f17cb7013485. Please review the logs for more information.

Once you've pushed the fixes, the build will automatically re-run. Thanks!

[codecov-io]

Codecov Report

Merging #2108 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #2108   +/-   ##
========================================
  Coverage    78.92%   78.92%           
========================================
  Files          330      330           
  Lines         7973     7973           
  Branches      1116     1114    -2     
========================================
  Hits          6293     6293           
  Misses        1648     1648           
  Partials        32       32

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