PHP 8.4 compatibility and better type-safety

What's Changed

• Upgrade to GitHub-native Dependabot by @dependabot-preview[bot] in #100
• build: run workflow on pull requests by @g105b in #103
• Improve PHPUnit fixtures by @peter279k in #102
• build: hard dependencies by @g105b in #184
• Bump phpgt/typesafegetter from 1.2.3 to 1.2.4 by @dependabot[bot] in #186
• maintenance: dependabot by @g105b in #195
• Improve CI by @g105b in #228
• Add JetBrains sponsorship to README with H1 heading by @g105b in #232
• feature: deprecate merge, use withMerge instead closes #86 by @g105b in #233

New Contributors

• @peter279k made their first contribution in #102
• @dependabot[bot] made their first contribution in #185

Full Changelog: v1.1.0...v1.1.1