Windows support: unlink file after it has been closed

[asb-capfan]

Otherwise install on Windows will fail with:

    t/parse_file.t .................. Error in tempfile() using template \XXXXXXXXXX.xhtml: Could not create temp file \WzBMoEw1MY.xhtml: Permission denied at t/parse_file.t line 10.
    # Looks like your test exited with 13 before it could output anything.
    t/parse_file.t .................. Dubious, test returned 13 (wstat 3328, 0xd00)

[asb-capfan]

cf. https://www.perlmonks.org/?node_id=163693

[petdance]

Thanks for this. I don't know when I'll be able to get to it, since HTML::Lint is definitely back-burner for me.

Have you looked at HTML::Tidy5? It's got many more features, and supports HTML5, but I don't know what it's like using it on Windows.

[asb-capfan]

I didn't know about HTML::Tidy5 yet - thanks.

NB: I tested the installation with my "patch". The CI build is failing for some other reasons that seem to be related to perlbrew.