Update phpstan/phpstan requirement from 1.5.6 to 1.5.7

[dependabot[bot]]

Updates the requirements on phpstan/phpstan to permit the latest version.

Release notes

Sourced from phpstan/phpstan's releases.

1.5.7

Bugfixes 🐛

• Fix array_merge with numeric keys (#1218), thanks @​herndlm!
• Fix ConstantArrayTypeBuilder optional keys via setOffsetValueType (#1225), thanks @​herndlm!
• Fix array_push with an empty constant array (#1210), #6974, thanks @​herndlm!
• Fix array_push / array_unshift with ConstantArrayType arguments (#1232), #5783, thanks @​herndlm!
• Fix variadic parameters for generics (https://github.com/phpstan/phpstan-src/commit/f091c5629a48620972c657993032522def8a840d), #7068
• PHPStan Pro download API - pass current PHP version (https://github.com/phpstan/phpstan-src/commit/9044bfc33d254858ce44969848230477cb8f3ca7)
• PHPStan Pro - fix for potential issues on temp files (https://github.com/phpstan/phpstan-src/commit/2a145bad4e3d171e3a917e0f1f3e757bd5a6c523)
• Improve variadic parameter support in array_merge (#1233), thanks @​herndlm!

Commits

• 7fb7e2e PHPStan 1.5.7
• fcb6539 Updated PHPStan to commit 8862d57ccb159e50c6b54aa4c038fd61369fb3d0
• 1dc9ee7 Updated PHPStan to commit 9044bfc33d254858ce44969848230477cb8f3ca7
• e73a013 Updated PHPStan to commit f091c5629a48620972c657993032522def8a840d
• 9924817 Updated PHPStan to commit 39e8286c248f441641ce81bf2cccb8363759c5fc
• 438161f Updated PHPStan to commit 1863c7976811015ed55d088f9f35a6032be8c7e6
• f59d863 Updated PHPStan to commit 06a5c2602769e8a177c75de2daeba1fcfdddb15f
• 95114dd Updated PHPStan to commit 8084ab3bbac6f4508e92c3027ef58337e4c8a13f
• See full diff in compare view

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[codecov[bot]]

Codecov Report

Merging #160 (e684a45) into master (9bf978c) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #160   +/-   ##
=========================================
  Coverage     94.19%   94.19%           
  Complexity       62       62           
=========================================
  Files             1        1           
  Lines           155      155           
=========================================
  Hits            146      146           
  Misses            9        9           

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