dev-perl/WWW-Mechanize: Bump to version 1.840.0

dev-perl/WWW-Mechanize: Bump to version 1.840.0

Upstream:
- Fix submit_form with multiple filters
- Workaround HTTP::Cookies bug in reload()
- Fix HTTPS tests when no LWP::Proto::https installed
- Add strict_forms flag to submit_form()
- Live tests are now author tests
- Parse url/href for js window open
- mech-dump STDOUT is now utf8
- mech-dump now has --version option
- Don't die on uri() when there is no request
- Test fixes.

Package-Manager: Portage-2.3.4, Repoman-2.3.2