Bump shivammathur/setup-php from 2.7.0 to 2.8.0

[dependabot]

Bumps shivammathur/setup-php from 2.7.0 to 2.8.0.

Release notes

Sourced from shivammathur/setup-php's releases.

2.8.0

• Add support to setup a specific Composer version. For example to setup Composer 2.0.6.

- name: Setup PHP
  uses: shivammathur/setup-php@v2
  with:
    php-version: '7.4'
    tools: composer: 2.0.6

• Add support for couchbase extension for PHP 5.6 to PHP 7.4.

- name: Setup PHP
  uses: shivammathur/setup-php@v2
  with:
    php-version: '7.4'
    extensions: couchbase

• Set blackfire-player to v1.9.3 for PHP 5.5 to PHP 7.0.
• Set composer version to v1 when prestissimo or composer-prefetcher is specified in tools. It is recommended to stop using prestissimo as Composer 2 is faster on its own.
• Document using setup-php on i386 and amd64 containers using spc. Docs. Closes #326.
• Add workflow to document extensions that are enabled by default on wiki. (#327)
• Fix tools setup when latest release does not have the tool in release assets. Will now fetch tool from the previous release till it is added to the latest release.
• Improve regex for pre-release PECL extensions. (#325)
• Install VcRedist from GitHub on Windows.
• Update PHP dependencies as per GitHub Action runner version on macOS.
• Fix grpc_php_plugin setup. Now uses Xcode 11.7 as compiling it with Xcode 12 is flaky.
• Fix extension setup on PHP 8.0 and PHP 8.1 and for all PHP versions on self-hosted Linux.
• Fix composer setup when it is a dependency of a tool.
• Revert back to apt-fast as after 1.9.10 release it reports correct exit codes.
• Revert back to using dashes in step-ids as issue parsing them is fixed upstream (Rewrite contexts before evaluating them nektos/act#287).
• Use GitHub releases(s3) as primary source for builds and scripts with bintray only as fallback. This will scale setup-php better and avoid bintray's 2TB/month download limit.
• Refactor and dry linux.sh and darwin.sh.
• Fix contribution docs.

Thanks @GrahamCampbell and @mlocati for the contributions 🎉

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Commits

• a67fcb9 Merge pull request #337 from shivammathur/develop
• 0376a41 Bump version to 2.8.0
• d5adfa5 Update README
• ac6e635 Fix grpc_php_plugin setup
• 94ea6f0 Add support for couchbase
• 3e5a899 Fix extension setup on self-hosted linux
• d8bc358 Revert "Remove dashes from step ids"
• 1fb6e1b Revert "Switch to apt-get"
• 314aa52 Improve web requests
• ae603e8 Refactor to dry unix scripts
• Additional commits viewable in compare view

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