4.9.0

Total issues resolved: 12

• 3058: Implement exception class for Gone Http error thanks to @TheKernelPanic
• 3086: Update slim/psr7 requirement from ^1.3 to ^1.4 thanks to @dependabot[bot]
• 3087: Update nyholm/psr7-server requirement from ^1.0.1 to ^1.0.2 thanks to @dependabot[bot]
• 3093: Update phpstan/phpstan requirement from ^0.12.85 to ^0.12.90 thanks to @dependabot[bot]
• 3099: Allow updated psr log thanks to @t0mmy742
• 3104: Drop php7.2 thanks to @t0mmy742
• 3106: Use PSR-17 factory from Guzzle/psr7 2.0 thanks to @t0mmy742
• 3108: Update README file thanks to @t0mmy742
• 3112: Update laminas/laminas-diactoros requirement from ^2.6 to ^2.8 thanks to @dependabot[bot]
• 3114: Update slim/psr7 requirement from ^1.4 to ^1.5 thanks to @dependabot[bot]
• 3115: Update phpstan/phpstan requirement from ^0.12.96 to ^0.12.99 thanks to @dependabot[bot]
• 3116: Remove Zend Diactoros references thanks to @l0gicgate