PHP 8.1 compatibility fixes

See #153 for PHP 8.1 support improvements.

What's Changed

• Bump monolog/monolog from 2.3.1 to 2.3.2 by @dependabot in #54
• Bump phpstan/phpstan from 0.12.93 to 0.12.94 by @dependabot in #55
• Bump phpunit/phpunit from 9.5.7 to 9.5.8 by @dependabot in #56
• Bump friendsofphp/php-cs-fixer from 3.0.0 to 3.0.2 by @dependabot in #58
• Bump phpstan/phpstan from 0.12.94 to 0.12.95 by @dependabot in #59
• Bump phpstan/phpstan from 0.12.95 to 0.12.96 by @dependabot in #60
• Bump friendsofphp/php-cs-fixer from 3.0.2 to 3.1.0 by @dependabot in #61
• Bump phpunit/phpunit from 9.5.8 to 9.5.9 by @dependabot in #62
• Implement HTTP tests using httpbin.org by @macbre in #63
• Improve tests for cache drivers by @macbre in #64
• Images test by @macbre in #65
• Bump phpstan/phpstan from 0.12.96 to 0.12.97 by @dependabot in #66
• Bump phpstan/phpstan from 0.12.97 to 0.12.98 by @dependabot in #67
• Bump phpstan/phpstan from 0.12.98 to 0.12.99 by @dependabot in #68
• Bump monolog/monolog from 2.3.2 to 2.3.4 by @dependabot in #69
• Bump phpunit/phpunit from 9.5.9 to 9.5.10 by @dependabot in #70
• Bump predis/predis from 1.1.7 to 1.1.8 by @dependabot in #71
• Bump monolog/monolog from 2.3.4 to 2.3.5 by @dependabot in #72
• Bump predis/predis from 1.1.8 to 1.1.9 by @dependabot in #74
• Bump friendsofphp/php-cs-fixer from 3.1.0 to 3.2.1 by @dependabot in #73
• Bump phpstan/phpstan from 0.12.99 to 1.0.1 by @dependabot in #76
• Bump phpstan/phpstan from 1.0.1 to 1.0.2 by @dependabot in #77
• Bump phpstan/phpstan from 1.0.2 to 1.1.1 by @dependabot in #78
• Bump phpstan/phpstan from 1.1.1 to 1.1.2 by @dependabot in #79
• Bump friendsofphp/php-cs-fixer from 3.2.1 to 3.3.2 by @dependabot in #80
• Bump phpstan/phpstan from 1.1.2 to 1.2.0 by @dependabot in #81
• Bump friendsofphp/php-cs-fixer from 3.3.2 to 3.4.0 by @dependabot in #82
• Bump phpunit/phpunit from 9.5.10 to 9.5.11 by @dependabot in #83
• Bump phpstan/phpstan from 1.2.0 to 1.3.0 by @dependabot in #84
• Bump phpstan/phpstan from 1.3.0 to 1.3.1 by @dependabot in #85
• Bump predis/predis from 1.1.9 to 1.1.10 by @dependabot in #86
• Bump phpstan/phpstan from 1.3.1 to 1.3.3 by @dependabot in #87
• Bump phpstan/phpstan from 1.3.3 to 1.4.0 by @dependabot in #88
• Bump phpstan/phpstan from 1.4.0 to 1.4.1 by @dependabot in #89
• Bump phpstan/phpstan from 1.4.1 to 1.4.2 by @dependabot in #90
• Bump phpunit/phpunit from 9.5.11 to 9.5.12 by @dependabot in #91
• Bump phpunit/phpunit from 9.5.12 to 9.5.13 by @dependabot in #92
• Bump phpstan/phpstan from 1.4.2 to 1.4.3 by @dependabot in #93
• Bump phpstan/phpstan from 1.4.3 to 1.4.4 by @dependabot in #94
• Bump phpstan/phpstan from 1.4.4 to 1.4.5 by @dependabot in #95
• Bump phpstan/phpstan from 1.4.5 to 1.4.6 by @dependabot in #96
• Bump phpunit/phpunit from 9.5.13 to 9.5.14 by @dependabot in #97
• Bump phpunit/phpunit from 9.5.14 to 9.5.15 by @dependabot in #98
• Bump phpunit/phpunit from 9.5.15 to 9.5.16 by @dependabot in #99
• Bump phpstan/phpstan from 1.4.6 to 1.4.7 by @dependabot in #100
• Bump phpstan/phpstan from 1.4.7 to 1.4.8 by @dependabot in #101
• Bump phpunit/phpunit from 9.5.16 to 9.5.17 by @dependabot in #102
• Bump phpunit/phpunit from 9.5.17 to 9.5.18 by @dependabot in #103
• Bump phpstan/phpstan from 1.4.8 to 1.4.9 by @dependabot in #104
• Bump phpstan/phpstan from 1.4.9 to 1.4.10 by @dependabot in #105
• Bump monolog/monolog from 2.3.5 to 2.4.0 by @dependabot in #106
• Bump phpunit/phpunit from 9.5.18 to 9.5.19 by @dependabot in #107
• Bump phpstan/phpstan from 1.4.10 to 1.5.2 by @dependabot in #109
• Bump phpstan/phpstan from 1.5.2 to 1.5.3 by @dependabot in #110
• Bump phpunit/phpunit from 9.5.19 to 9.5.20 by @dependabot in #111
• Bump phpstan/phpstan from 1.5.3 to 1.5.4 by @dependabot in #112
• Bump monolog/monolog from 2.4.0 to 2.5.0 by @dependabot in #113
• Bump phpstan/phpstan from 1.5.4 to 1.5.5 by @dependabot in #114
• Bump phpstan/phpstan from 1.5.5 to 1.5.6 by @dependabot in #115
• Bump phpstan/phpstan from 1.5.6 to 1.5.7 by @dependabot in #116
• Bump phpstan/phpstan from 1.5.7 to 1.6.0 by @dependabot in #117
• Bump phpstan/phpstan from 1.6.0 to 1.6.2 by @dependabot in #118
• Bump phpstan/phpstan from 1.6.2 to 1.6.3 by @dependabot in #119
• Bump phpstan/phpstan from 1.6.3 to 1.6.4 by @dependabot in #120
• Bump phpstan/phpstan from 1.6.4 to 1.6.5 by @dependabot in #121
• Bump phpstan/phpstan from 1.6.5 to 1.6.7 by @dependabot in #122
• Bump phpstan/phpstan from 1.6.7 to 1.6.8 by @dependabot in #123
• Bump monolog/monolog from 2.5.0 to 2.6.0 by @dependabot in #124
• Bump phpstan/phpstan from 1.6.8 to 1.6.9 by @dependabot in #125
• Bump phpstan/phpstan from 1.6.9 to 1.7.1 by @dependabot in #126
• Bump phpstan/phpstan from 1.7.1 to 1.7.2 by @dependabot in #127
• Bump phpstan/phpstan from 1.7.2 to 1.7.4 by @dependabot in #128
• Bump phpstan/phpstan from 1.7.4 to 1.7.7 by @dependabot in #129
• Bump phpstan/phpstan from 1.7.7 to 1.7.8 by @dependabot in #130
• Bump phpstan/phpstan from 1.7.8 to 1.7.9 by @dependabot in #131
• Bump phpstan/phpstan from 1.7.9 to 1.7.10 by @dependabot in #132
• Bump phpstan/phpstan from 1.7.10 to 1.7.11 by @dependabot in #133
• Bump phpstan/phpstan from 1.7.11 to 1.7.12 by @dependabot in #135
• Bump monolog/monolog from 2.6.0 to 2.7.0 by @dependabot in #136
• Bump predis/predis from 1.1.10 to 2.0.0 by @dependabot in #134
• Bump phpstan/phpstan from 1.7.12 to 1.7.14 by @dependabot in #137
• Bump phpunit/phpunit from 9.5.20 to 9.5.21 by @dependabot in #138
• Bump phpstan/phpstan from 1.7.14 to 1.7.15 by @dependabot in #139
• Test using PHP 8.1 as well by @macbre in #140
• Bump phpstan/phpstan from 1.7.15 to 1.8.0 by @dependabot in #141
• Bump phpstan/phpstan from 1.8.0 to 1.8.1 by @dependabot in #142
• Bump phpstan/phpstan from 1.8.1 to 1.8.2 by @dependabot in #143
• Bump monolog/monolog from 2.7.0 to 2.8.0 by @dependabot in #144
• Bump phpunit/phpunit from 9.5.21 to 9.5.22 by @dependabot in #145
• Bump phpunit/phpunit from 9.5.22 to 9.5.23 by @dependabot in #146
• Bump phpunit/phpunit from 9.5.23 to 9.5.24 by @dependabot in #147
• Bump phpstan/phpstan from 1.8.2 to 1.8.3 by @dependabot in #148
• Bump phpstan/phpstan from 1.8.3 to 1.8.4 by @dependabot in #149
• Bump predis/predis from 2.0.0 to 2.0.1 by @dependabot in #150
• Bump predis/predis from 2.0.1 to 2.0.2 by @dependabot in #151
• Bump phpstan/phpstan from 1.8.4 to 1.8.5 by @dependabot in #152
• Run linter using PHP 8.1 as well (and fix any issues) by @macbre in #153

Full Changelog: v0.6.0...v0.7.0