Update phpstan/phpstan requirement from ^0.12.52 to ^1.1.1

[dependabot[bot]]

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

Release notes

Sourced from phpstan/phpstan's releases.

1.1.1

Bugfixes 🐛

• Fixed /** @phpstan-ignore-line */ and /** @phpstan-ignore-next-line */ annotations sometimes not working because of AST (https://github.com/phpstan/phpstan-src/commit/9474696dff040ba6d5a9adadc8c87551074cbf94), #4750, #4759, #3834, #3563, #4250, #4798
• Do not report non-existent function after function_exists() check (https://github.com/phpstan/phpstan-src/commit/28e8c11a2bdf11eede53a152825fd3bd7733d95d), #3576
• Make function_exists() similar to is_callable() (https://github.com/phpstan/phpstan-src/commit/4a988637e67b6ff6854192c57adbbe3c32d62629), #1849

Commits

• cb31702 PHPStan 1.1.1
• cc030e9 Updated PHPStan to commit 9b5387833e1d95c4294edaa03141f7ad427c76aa
• f418552 Updated PHPStan to commit 9474696dff040ba6d5a9adadc8c87551074cbf94
• ed9478a Updated PHPStan to commit 4a988637e67b6ff6854192c57adbbe3c32d62629
• 7cb62ff Updated PHPStan to commit 28e8c11a2bdf11eede53a152825fd3bd7733d95d
• 997eb8e PHPStan 1.1.0
• bd81179 Updated PHPStan to commit 6bb0fd66ce3344934549c38366906a5d20d6a3db
• dc27acb Updated PHPStan to commit e3a0e0d1b968c4338d2a50d76562c49e49521565
• 4ace177 Updated PHPStan to commit 5a907319eda0dcd86b4e130867f820fa30185095
• 91e2a3c Updated PHPStan to commit 625cb846a14e7a401534c04442e1f08cfd90251b
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #43.