Releases for Hreflang

• Add d11 compatibility

• #3388683: x-default tag should be able to point at the fallback language
• Use GitLab CI
• Fix test failures on Drupal 10.2 branch

• Add type declarations for static analysis
• #3321453: Replace README.txt with README.md
• #3331749: Update README.md as per README.md format
• Minor code cleanup

• #3266621: Remove hreflang link HTTP header to stay in sync with core: Remove hreflang link HTTP headers as they are redundant with link HTML tags and cause excessively large HTTP headers when many languages are enabled.

• Add Drupal 7 migration

• #2376417: Add x-default: Allow administrators to enable an additional x-default hreflang tag via new settings page at admin/config/search/hreflang (the additional tag only appears on Drupal core 7.83 or later)

Fix deprecations, static analysis and code style issues.

• Provide Drupal 9 compatibility;
• Static analysis fixes; and
• Use translation trait.

• Rename module from Alternate hreflang to Hreflang
• Remove unused variables
• Workaround a core bug in Comment module: #2980322: Remove page=0 query parameter

Bug fixes and new features:

• #2764077: In hook_language_switch_link_alter not possible to change hreflang value from other modules.: The link tag's hreflang attribute is now set to the switch link's hreflang attribute rather than the switch link's langcode key
• Adds README.txt
• Fixes code style issues

Adds support for session/request-based language detection.

Fixes potential incorrect hreflang tag and PHP notice if Content translation module is enabled.