Update dependency phpstan/phpstan to v1.4.6

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.4.3 -> 1.4.6

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Release Notes

phpstan/phpstan

v1.4.6

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Improvements

• Implemented constant type inference for implode() function (#​991), thanks @​staabm!

Bugfixes

• Fix interaction between template type and union type (#​992), #​5591, thanks @​arnaud-lb!
• Delegate most of TypeCombinator::remove() to Type::tryRemove() (#​994), #​6438, thanks @​arnaud-lb!
• TemplateType should accept a TemplateType derived from itself (#​999), #​5844, #​5706, thanks @​arnaud-lb!
• Fixed intersecting and removal from TemplateUnionType (https://github.com/phpstan/phpstan-src/commit/0d288353ca782ef79e362657c2581abf4246a2f8), #​6566
• Fixed type seen by IterableInForeachRule with inline @var right above foreach (https://github.com/phpstan/phpstan-src/commit/b6bbbaf6b01cbd43ae2800bbd00fe0ddbcb2e0d9), #​6564
• modulo 1 is always zero (#​973), thanks @​staabm!
• multiply by zero is always zero (#​974), thanks @​staabm!
• Fixed discovering backed enum without space around : (https://github.com/phpstan/phpstan-src/commit/5162bcfea5456eb827035cd249c5ace55057237b), https://github.com/composer/composer/issues/10498

Function signature fixes

• Function md5() always return non-empty-string (#​987), thanks @​janbarasek!
• Correct the case for parameters that accept an instance of Iterator. (#​988), thanks @​johnbillion!
• Fix the return types of round()/ceil()/floor() (#​729), thanks @​johnbillion!
• Correct the return type of SplFileObject::fstat() (#​996), thanks @​johnbillion!
• Improve the return type of functions that return an indexed array of strings (#​997), thanks @​johnbillion!

v1.4.5

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Improvements

• AnalyseApplication: Do not re-analyse stubs on every run (#​730), #​5826, thanks @​dktapps!
• Add shorthand for --generate-baseline (-b) (#​980), thanks @​Seldaek!
• Support narrowing down array_filter() return type via string callable (#​938), #​6417, thanks @​herndlm!
• Loop optimization (#​757), thanks @​ging-dev!

Bugfixes

• Fixed level 9 issues (https://github.com/phpstan/phpstan-src/commit/9f12f0fb4877b28cdad42644d927f579c42db22d), #​6423, #​6464, #​6236, #​6418, #​6118, #​6081, #​6053, #​6055, #​5860, #​6230
• Cast PHPDoc array key type with array key casting rules (https://github.com/phpstan/phpstan-src/commit/5d17b847d9f60a0fba21d76d813a612c042fdb1c), #​6117
• Support closure bind with class-string (#​706), #​4949, thanks @​mvorisek!
• Fix NeverType::toBoolean() (https://github.com/phpstan/phpstan-src/commit/fe3a3419d5d8d2b276456971afc3e1804ab1c759), #​6258
• Fix DatePeriod constructor extension in subclasses (https://github.com/phpstan/phpstan-src/commit/0c82b3a2675f636db920a0a3e077a45a87200766), #​6500
• Forget remembered specific type when entering arrow function with same-named parameter (https://github.com/phpstan/phpstan-src/commit/af38f03b41d002bd01afa989921acd9f1114fc0e), #​6473
• Fix segfault (https://github.com/phpstan/phpstan-src/commit/d101764ff94a5838930a11fdac7ca9156ded7dc4), #​6501

Function signature fixes

• More precise array_chunk signature (#​709), thanks @​staabm!
• Narrow the type for the preg_replace_callback() callable. (#​758), thanks @​johnbillion!
• Update return types for hash functions (#​822), thanks @​jlherren!
• Fix type for array_splice() argument $replacement (#​901), #​6288, thanks @​spawnia!
• stream_bucket_new returns an object (#​968), thanks @​mind-bending-forks!
• More precise signatures for mb_* functions (#​717), thanks @​staabm!
• Fix array_column() with null as $column_key (#​970), thanks @​jlherren!

v1.4.4

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Improvements

• Return type extension for array_column() (#​948), thanks @​jlherren!
• Generic stub for DatePeriod + constructor dynamic return type extension (#​958), #​5953, thanks @​Alban-io!
• Resolve remaining predefined constants (#​693), thanks @​herndlm!

Bugfixes

• Support all array_filter() flags for narrowing down types (#​941), thanks @​herndlm!
• Fix error The supplied range exceeds the maximum array size (#​934), #​6375, thanks @​voku!
• Nullable union template type bound is actually supported (https://github.com/phpstan/phpstan-src/commit/1d8b2eb269b1de8c449b372580852c2a6307c323), #​4656, #​5305, #​3384
• Fix reporting nonexistent offset in isset() (https://github.com/phpstan/phpstan-src/commit/f05e8eb8fe3d979afa9e627371f4df92ab28fadf), #​4926
• Fix interaction between template type and intersection type (#​955), #​6210, thanks @​arnaud-lb!
• Fix tests on 32-bit (#​957), thanks @​herndlm!
• Fix resolving type of isset(), empty() and null coalesce operator (??) (https://github.com/phpstan/phpstan-src/commit/3b17acc5de4ac507d678f9ca9b2cd15937921ffb), #​4592, #​4903, #​2420, #​2718, #​3126, #​4586, #​4887

Function signature fixes

• Narrow down the return type of the Throwable::getTrace() method (#​914), thanks @​ste93cry!
• Fix DOMDocument::saveXML signature (#​956), thanks @​kissifrot!

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