[mfridman]

This PR fixes how tparse handles packages without test files when tests run with -cover. Since Go 1.22, these packages were missing from the -notests output, and -progress reported them as passed.

# before
[PASS]       0.46s      example.com/mod/notests

# after
[SKIP]       0.46s      example.com/mod/notests [no test files]

With -notests, they now show as NOTEST, the same as without -cover. The default output does not change.

Closes #106