chore(deps): update dependency phpstan/phpstan to v1.4.10

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	1.4.9 -> 1.4.10

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Release Notes

phpstan/phpstan

v1.4.10

Compare Source

• Fix the difference between ?T and T|null (https://github.com/phpstan/phpstan-src/commit/28776ffd4604e92761e09413cfc9c096d2547ad8), #​6790
• Check property assign TypeError throw point by native type (#​1065), #​6791, #​6786, thanks @​rajyan!

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