Make dtslint work for directories with minor versions

[rurikoaraki]

Fixes #333

This PR will allow the dtslinter to work with directories that contain minor version numbers. For example if I define a v0.63 directory, these changes will allow dtslinter to correctly lint that directory.

Changed some regex's in the index and util files to account for minor versions. Added some tests to ensure that the behavior is working as intended.

Bumping package.json version so that these changes can be used by DT.

Ran tests and the dt-header tests run as expected.

[rurikoaraki]

Pinging @orta as well in case sandersn is away

[fedemp]

This PR would unblock this another PR. DefinitelyTyped/DefinitelyTyped#53834

[sandersn]

Arggh! Sorry, I messed up and missed this PR. I ended up making #338 independently, which is basically the same, just slightly stricter.

@fedemp did the earlier version of DefinitelyTyped/DefinitelyTyped#53834 need a minor version greater than 0.*? If so, maybe this PR is better; however, I'd have to go check that the publisher also supports minors greater than 0.*

@rurikoaraki I reopened DefinitelyTyped/DefinitelyTyped#53595 to test whether the new version of dtslint lets it pass.
Edit: It does.

[rurikoaraki]

@sandersn No worries! Thanks for fixing this! I'll close this PR out.

ETA: The PR on DT seems to have passed CI.