Add a test command

[blittle]

WHY are these changes introduced?

Fixes #0000

WHAT is this pull request doing?

How to test your changes?

Post-release steps

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	74.41% (-0.82% 🔻)	8771/11788
🟡	Branches	70.01% (-0.54% 🔻)	4275/6106
🟡	Functions	74.58% (-0.38% 🔻)	2294/3076
🟡	Lines	74.91% (-0.86% 🔻)	8293/11071

Show new covered files 🐣

St.❔	File	Statements	Branches	Functions	Lines
🔴	... / locators.ts	0%	0%	0%	0%
🔴	... / test.ts	0%	0%	0%	0%

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / app-event-watcher.ts	93.83% (-1.23% 🔻)	86.49% (-2.7% 🔻)	90.48%	98.61%
🟡	... / build.ts	74% (-0.51% 🔻)	61.36%	75.76% (-0.71% 🔻)	71.74% (-0.6% 🔻)
🟢	... / getTomls.ts	90.91%	50% (-12.5% 🔻)	100%	90.91%
🟢	... / node-package-manager.ts	86.74% (-0.07% 🔻)	84.44%	88.89%	86.59% (-0.07% 🔻)

Test suite run success

1975 tests passing in 896 suites.

Report generated by 🧪jest coverage report action from 38685aa

[github-actions]

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