Update phpstan/phpstan requirement from 1.8.0 to 1.9.2

[dependabot[bot]]

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

Release notes

Sourced from phpstan/phpstan's releases.

1.9.2

Bugfixes 🐛

• Fix array and iterable type action methods on NeverType (#1968), #8277, thanks @​herndlm!
• Support 'HasMethodType' on StaticCall (#1969), #1267, thanks @​staabm!
• Addition operation on MixedType without ArrayType cannot result in ArrayType (#1949), thanks @​staabm!
• Remove DateInterval stub (#1974), thanks @​VincentLanglet!
• Fix invalidate static expressions in closures (#1983), #8292, thanks @​rajyan!
• Fix false positive of access to private property of parent class (#1953), #2435, thanks @​tyabu12!
• Fix unset on nested array (#1987), #8113, thanks @​rvanvelzen!

Function signature fixes 🤖

• Update DateTimeZone::listAbbreviations signature (#1962), thanks @​franmomu!
• Making json_encode() always produce a non-empty-string, when successful (#1980), thanks @​Slamdunk!
• sodium_crypto_generichash* always produce a non-empty-string (#1981), thanks @​Slamdunk!
• sodium_crypto_sign* always produce non-empty-string (#1985), thanks @​Slamdunk!

Internals 🔍

• Implement isClassStringType() on Type (#1970), #6147, thanks @​staabm!
• Implement isInteger() on Type (#1971), thanks @​staabm!
• Implement isBoolean() on Type (#1973), thanks @​staabm!
• Implement isFloat() on Type (#1977), thanks @​staabm!
• Implement isNull() on Type (#1978), thanks @​staabm!
• Add Type::isVoid() (#1982), thanks @​herndlm!

Commits

• d6fdf01 PHPStan 1.9.2
• ac5ea90 Fix Larastan
• 953a97b Updated PHPStan to commit 582a9cb8b9b4fce2bd069bac26bf1d31dd52e7e2
• f878d19 Updated PHPStan to commit b4ac8a1e09d46fe6180962d5d681ffec1fac2d84
• 7db7d40 Updated PHPStan to commit f8f09cdb60a0a6214199f5a765a7782cb110e52e
• 4218398 Bye bye old issue bot!
• 172a390 Updated PHPStan to commit 8faf0fbde83ef3b681b570c1f714f7c938cb3a9f
• 80714c3 Updated PHPStan to commit b8accb117f03741ac95f0a0c9de4a7e4edffab05
• a56ae2c Fix retrieveSample
• ed192b9 Playground API - retrieveSample
• Additional commits viewable in compare view

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[dependabot[bot]]

Superseded by #213.