This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	`1.4.8` -> `1.4.9`

phpstan/phpstan

Improvements 🔧

Identical (=== and !==) and Equal (== and !=) with the same variables resolve to ConstantBooleanType (https://github.com/phpstan/phpstan-src/commit/98c4d84ec983fb36992119d4c393d7192a2a99b6)
Scalars of the same type on both of Equal (== and !=) are delegated to Identical (=== and !==) (https://github.com/phpstan/phpstan-src/commit/316f269d6e81fcfa435f74cb1155076e349f053f)

Bugfixes 🐛

Fix trait detection recursion (#1050), #6740, thanks @herndlm!
Do not add null to a template type for a default parameter value null (https://github.com/phpstan/phpstan-src/commit/7a66cb6eda85703811c7dce472355e036d70c144), #6584
Fix nullable closure parameter type (https://github.com/phpstan/phpstan-src/commit/c05ba984a08d1fa50e0edf63e99a9a893e78e821), #6701
TemplateType - fix description for subtracted mixed bound (https://github.com/phpstan/phpstan-src/commit/6525d6805b1beece69ec97802bdf16dd8545cfdf)
Fix dead catch when iterating objects (#1051), #5903, thanks @rajyan!
Fix false positive dead catch on property assignment (#1047), #6256, thanks @rajyan!
Fix template type subtraction and union (https://github.com/phpstan/phpstan-src/commit/51e2df38ee7fbda5416e1c5c1091dacf8618f3e1), #6591
Simulate offsetSet to get throw points for ArrayAccess assignment (#1054), #4852, thanks @rajyan!
Make return type extension for array_column() aware of PHP version (#1053), thanks @jlherren!
Fix Unused private constant with an indirect access (#1059), #6758, thanks @rajyan!
Fix Equal (== and !=) handling in TypeSpecifier (https://github.com/phpstan/phpstan-src/commit/10b295f3cde7d91cc2b2784fc012910be6a06fb8)
Fix more TypeSpecifier issues regarding Identical (=== and !==) (#1058)

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