dev-perl/Test-WWW-Mechanize: Bump to version 1.480.0

dev-perl/Test-WWW-Mechanize: Bump to version 1.480.0

- EAPI6
- Purge pod author tests
- Parallel tests

Upstream:
- Use HTML::Lint API correctly to catch all errors at end of page
- Add header_exists_ok, lacks_header, header_is, header_like, delete_ok
  methods
- Don't auto-assign a description in scraped_id_is
- Give proper diagnostics if scraped_id_is is not found
- content_contains now fails when called with regex
- content_like now fails when not called with a regex
- Forbid testing URLs outside document tree in test suite
- Fix restrictive optimization in scrape_text_by_id

Package-Manager: Portage-2.3.18, Repoman-2.3.6