Replace deprecated tap functions

[jozefizso]

I replaced all the deprecated functions in tap tests. This keeps the tests output nice and tidy and it allows to upgrade to the latest tap release (v20 for NodeJS 18+, or v21 for NodeJS 20+) in the future.

Test report on master branch:

Suites:   ​33 passed​, ​33 of 33 completed
Asserts:  ​​​6187 passed​, ​of 6187
​Time:​   ​3s

Test report after replacing deprecated functions:

Suites:   ​33 passed​, ​33 of 33 completed
Asserts:  ​​​6187 passed​, ​of 6187
​Time:​   ​2s