Update dependency phpstan/phpstan to v0.11.15

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require-dev	patch	0.11.12 -> 0.11.15

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Release Notes

phpstan/phpstan

v0.11.15

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Bugfixes

• Fixed new static() in abstract class with final constructor (3e5905f), #​2368
• Fixed behaviour of abstract constructors with new static() (1be5b3a), #​2369

v0.11.14

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Improvements

• InstantiationRule - check new static() in final class, with final constructor, or when the constructor comes from an implemented interface (3e5cd7f)

Bleeding edge

See explanation in previous release notes.

• new static() is safe only with final constructor or in final class - level 0 (3ebf508). See the Twitter poll about this.

Bugfixes

• Fix resolving static in constant array (a02404b), #​2360
• PhpMethodReflection - fixed isDeprecated(), isInternal(), isFinal() (765179c)
• IncompatiblePropertyPhpDocTypeRule - fixed complaining about mixed when property has native typehint but no phpDoc (89cf4b1), #​2363
• Password constants are no longer mixed (e93fd2f), #​2362
• Mark NeverType as explicit to allow its usage in phpDocs (01a76d1), #​2297
• Fixed internal error when checking class existence with leading backslash (47a5cd2), #​2359
• Use more verbose type description when the parameter type contains callable (b343bbf), #​2353

v0.11.13

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Full PHP 7.4 support!

• Native property types (e54a7a5), link to RFC
• Arrow functions (c78f503), link to RFC
• Null coalesce assign operator ??= (9552811), link to RFC
• Array spread operator (a3bcc58), link to RFC
• Password hashing algorithm constant type is mixed (4c6c84c)
• Signatures about new PHP 7.4 functions (493d12d)
• Fixes deprecated call to ReflectionType::__toString() in PHP 7.4 (#​2275), thanks @​brunowowk!

Bugfixes

• Inferring private property types - do not propagate ErrorType/NeverType (60ab154)

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