chore: modernise package tooling and drop legacy support

[atymic]

Modernises the package's dependencies, test tooling and CI matrix.

PHP & Laravel

• Bump php to ^8.3. 8.2 is security-only until Dec 2026 and receives no bug fixes.
• Drop illuminate/support: ^11.0, keeping ^12.0 || ^13.0. L11 permits PHP 8.2, which conflicts with the new floor.
• Bump laravel/socialite to ^5.29.

Testing

• PHPUnit ^9.0 → ^12.5, and Mockery to ^1.6.
• Migrate the 28 @test annotations to #[Test] attributes (annotations were removed in PHPUnit 12).
• Rewrite phpunit.xml.dist for the 12.5 schema, dropping attributes removed in 10+ (convertErrorsToExceptions, backupStaticAttributes, verbose) and moving <coverage><include> to <source>.
• Declare clientId/clientSecret/redirectUrl on OAuth1\Server. ConfigTrait::setConfig() assigned them without declaration, which is deprecated on PHP 8.4+.
• Drop a no-op ReflectionProperty::setAccessible() call, deprecated in PHP 8.5.

The suite passes on PHP 8.5 with no deprecations.

Lumen

Removes the Lumen branch from ServiceProvider. Lumen's final release (v11.2.0, Nov 2024) requires illuminate/support: ^11.0, so it can no longer resolve against this package once L11 is dropped — the branch is unreachable.

The SOCIALITEPROVIDERS_STATELESS reads in SocialiteWasCalled and OAuth1\AbstractProvider are deliberately kept, since users may define the constant themselves to force stateless mode. Only the Lumen-specific auto-define is gone.

CI

• Matrix now runs 8.3, 8.4, 8.5 (was 8.2–8.5), with 8.5 carrying coverage.
• Drop --no-suggest (a no-op since Composer 2) and phpunit -v (removed in PHPUnit 10).
• Add a separate Lint workflow running pint --test. pint.json was already committed but was never actually enforced. Pint is installed via setup-php, so it stays out of the package's dependency graph.

⚠️ The new Lint job will fail on this PR. It flags 10 files whose formatting predates this branch and that this PR does not touch. Reformatting them is deliberately left to a follow-up so the diff here stays reviewable. It is a separate workflow specifically so this does not mask the test matrix results.

Docs

Replace the dead Travis and SensioLabsInsight badges with the Actions badge, point Laravel doc links at 13.x, drop two Laravel 5-era Laracasts links, update socialiteproviders.netlify.app links to the live domain, and remove the "Lumen usage is easy" line.

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Note: this is a breaking change (PHP floor, L11 drop, Lumen removal) and needs a major version bump.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.72%. Comparing base (a67f194) to head (fa944ca).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #247      +/-   ##
============================================
+ Coverage     55.10%   56.72%   +1.62%     
- Complexity       78       79       +1     
============================================
  Files            10       10              
  Lines           245      238       -7     
============================================
  Hits            135      135              
+ Misses          110      103       -7     

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[Copilot]

Pull request overview

This PR modernises the package for current PHP/Laravel versions by raising the PHP floor, updating key dependencies, migrating the test suite to PHPUnit 12, and simplifying runtime integration by removing unreachable Lumen-specific logic. It also refreshes CI and documentation to match the new support baseline.

Changes:

• Upgrade runtime + dev dependencies (PHP ^8.3, drop illuminate/support:^11, bump Socialite, PHPUnit 12.5, Mockery 1.6).
• Update tests/config for PHPUnit 12 (migrate @test → #[Test], refresh phpunit.xml.dist schema, remove deprecated reflection usage).
• Remove Lumen-specific branches from the service provider; update CI workflows and README links/badges.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/UserTest.php	Migrates @test to #[Test] for PHPUnit 12 compatibility.
tests/ServiceProviderTest.php	Migrates @test to #[Test] for PHPUnit 12 compatibility.
tests/OAuthTwoTest.php	Migrates tests to #[Test], renames test methods, removes deprecated reflection call.
tests/OAuth2ProviderTest.php	Migrates @test to #[Test] for PHPUnit 12 compatibility.
tests/OAuth1ProviderTest.php	Migrates @test to #[Test] for PHPUnit 12 compatibility.
tests/ConfigTest.php	Migrates @test to #[Test] for PHPUnit 12 compatibility.
tests/ConfigRetrieverTest.php	Migrates @test to #[Test] for PHPUnit 12 compatibility.
src/ServiceProvider.php	Removes Lumen-specific logic; simplifies event firing to Laravel-only path.
src/OAuth1/Server.php	Declares config-set properties to avoid dynamic-property deprecations.
README.md	Updates badges and links; removes outdated references and Lumen messaging.
phpunit.xml.dist	Updates to PHPUnit 12.5 schema; moves coverage include to <source>.
composer.json	Raises PHP floor and updates dependency constraints/tooling versions.
.github/workflows/test.yml	Updates PHP matrix and PHPUnit invocation; adds explicit coverage run.
.github/workflows/lint.yml	Adds Pint lint workflow (currently repository-wide).

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