addr-osmify-js: fold check-unit-cov into check-unit
addr-osmify-js: fold check-unit-cov into check-unit

Mostly just to be in sync with addr-osmify-ts.

vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam,vmiklos/vmexam