fix types for tests for non-react packages

[peter-hamilton]

Description

Enabled type checking for tests in a number of quilt packages.

Changes

• date
  • specify Intl.DateTimeFormatOptions type for options.
• koa-performance
  • koa middleware was missing a next argument. Passed () => Promise.resolve
• koa-shopify-webhooks
  • Made Options.deliveryMethod an optional parameter because it has a default value in registerWebhook(). Tests were using the default value.
  • Used 'unstable' for cases where apiVersion was missing in tests.
  • fetchMock.lastCall() returns | undefined causing assignment errors. Fixed with non-null assertion operators.
• magic-entries-webpack-plugin
  • Used non-null assertion operator for optional webpack.Stats.ToJsonOutput.modules param.
• performance
  • Adjusted some casting logic.
• statsd
  • name variable was being passed to several mock functions, but wasn't defined. Used stats variable to align with the other tests.
• web-worker - Note: these tests are currently skipped.
  • Worker import changed to WebWorker
  • Add non-null assertion to workerElement retrieved from page.waitForSelector
  • in getTestClassInstanceCount typescript complains that the function signatures between Page and ExecutionContext aren't compatible. Solved by adding typeguards and duplicating the function calls. Couldn't find a cleaner solution.

Type of change

• date Patch: Bug (non-breaking change which fixes an issue)
• koa-performance Patch: Bug (non-breaking change which fixes an issue)
• koa-shopify-webhooks Patch: Bug (non-breaking change which fixes an issue)
• magic-entries-webpack-plugin Patch: Bug (non-breaking change which fixes an issue)
• performance Patch: Bug (non-breaking change which fixes an issue)
• statsd Patch: Bug (non-breaking change which fixes an issue)
• web-worker Patch: Bug (non-breaking change which fixes an issue)

Checklist

• I have added a changelog entry, prefixed by the type of change noted above (Documentation fix and Test update does not need a changelog as we do not publish new version)

[BPScott]

🎉