Update phpstan/phpstan requirement from 1.8.0 to 1.10.4

[dependabot[bot]]

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

Release notes

Sourced from phpstan/phpstan's releases.

1.10.4

Improvements 🔧

• Remove 3 leading spaces in PHAR (#2254), #8952, thanks @​ruudk!
• Add missing newline at the end of the file (#2254), thanks @​ruudk!
• RuleError interfaces are part of BC promise (https://github.com/phpstan/phpstan-src/commit/aed93193ae90d353661e10b0eabcf0528422231f)
• Update nikic/php-parser (https://github.com/phpstan/phpstan-src/commit/dda95b4fa735585369cb74429ab5ea8d37f82179)
• Update BetterReflection (#2274), #8889

Bugfixes 🐛

• Fix bug with array_column (#2244), #8917, thanks @​VincentLanglet!
• Improve filter_var() handling of a couple of simple scalars and null (#2262), thanks @​herndlm!
• Fix value-of for multiple enums (https://github.com/phpstan/phpstan-src/commit/3adc91d78b8108afc883dc5097656b6de0f38769), #8983
• Fix ->value on unions of enums (https://github.com/phpstan/phpstan-src/commit/05b85bad07a2c6628799fcb4a2939be7beab80cd), #9000

Function signature fixes 🤖

• Fix return type of Ds\Sequence::copy() (#1954), thanks @​MidnightDesign!
• Fix password_hash() return type (#2260), #5978, thanks @​VincentLanglet!

Commits

• 8d39218 PHPStan 1.10.4
• 4f9b5db Updated PHPStan to commit 4f9b5dbc4ce447c3170a3bd23647e2479443e730
• 05b85ba Updated PHPStan to commit 05b85bad07a2c6628799fcb4a2939be7beab80cd
• 3adc91d Updated PHPStan to commit 3adc91d78b8108afc883dc5097656b6de0f38769
• 83b6014 Added nikic/PHP-Parser into integration tests
• dda95b4 Updated PHPStan to commit dda95b4fa735585369cb74429ab5ea8d37f82179
• 9c9589c Updated PHPStan to commit 9c9589c661af5ff3e615d9001f67362546c199ca
• c0c11b2 Update playground-runner
• 8cc0a82 Update playground-api
• aed9319 Updated PHPStan to commit aed93193ae90d353661e10b0eabcf0528422231f
• Additional commits viewable in compare view

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Superseded by #237.