www/ruby-jekyll-seo-tag: update to 2.7.1

2.7.1 / 2020-10-18

Development Fixes
* refactor: mutate site payload instead of duplicating it (#419)

2.7.0 / 2020-10-18

Minor Enhancements
* Change pagination message with seo_paginator_message option (#324)
* Make Twitter Summary Card without having Twitter account (#284)
* Prefer site.tagline to site.description for page title (#356)
* Render og:locale meta only when defined explicitly (#388)

Bug Fixes
* Ensure a single leading @ for twitter usernames (#367)

Development Fixes
* chore(deps): require Ruby > 2.4.0 EOL
* test: fix locale specs that use the fallback locale (#360)
* refactor: Replace read-only empty hash with private constant (#418)
* refactor: Mutate hash literals instead of duplicating them (#417)
* refactor: Reduce allocations of instance-agnostic objects (#376)
* refactor: Memoize #author_hash in SeoTag::AuthorDrop (#342)
* refactor: simplify conditional in SeoTag::Drop#date_modified (#343)
* chore(ci): profile seo-tag plugin on a third-party repository (#414)
* chore(ci): Jekyll v4.0 (#372)
* chore(ci): test against current stable Ruby 2.5 and 2.7 (#385)
* style: align with latest jekyll-rubocop (#382)
* fix: Travis builds for Jekyll 3.x (#415)

Documentation
* Structured Data Testing Tool is deprecated (#409)
* Rename Google webmaster tools to Google Search Console (#403)
* Improve documentation on plugin usage (#399)
* remove Google+ from example snippet (#358)
* HTTPS link to https://ogp.me/ (#359)
* HTTPS links to schema.org (#350)
* use example.com for example URL (#351)

(taca)