Update dependency phpstan/phpstan to v0.12.78

This MR contains the following updates:

Package	Type	Update	Change
phpstan/phpstan	require	patch	0.12.77 -> 0.12.78

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Release Notes

phpstan/phpstan

v0.12.78

Compare Source

Improvements 🔧

• Remember assigned offset value on general arrays (phpstan/phpstan-src@0f64ca7), #​2112
• Result cache optimization (phpstan/phpstan-src@67b2d1c)
• Result cache - invalidate when scanned file changed (phpstan/phpstan-src@7d279fc), #​3952
• Result cache - hash autoload file and bootstrap files (phpstan/phpstan-src@3457e58), #​3416
• Parameter of closure passed into array_map/array_filter can resolve to a subtype of native type (phpstan/phpstan-src@bf320b0)

Bugfixes 🐛

• Invalidate count($array) after array_shift() (phpstan/phpstan-src@6b2afbc), #​4558
• Fix @template name clash from different scopes (phpstan/phpstan-src@527269a), #​4557, #​3121
• Symbol discovery - fixed looking for functions returning references (phpstan/phpstan-src@ec26a00), #​3829
• First argument of method_exists() might remain a string (phpstan/phpstan-src@91894ff), #​4573
• Added many regression tests for already fixed issues (#​2837, #​3096, #​3891, #​3544, #​2675, #​1897, #​1801, #​1711, #​4432, #​2268, #​2298, #​1903, #​2927, #​2434, #​2220, #​1871, #​1707, #​1664, #​1661, #​1656, #​1613, #​2682, #​2689, #​2714, #​2846, #​3309, #​3357, #​3534, #​3608, #​3669, #​3920, #​3261, #​4289, #​2568, #​4209, #​3034, #​3117, #​1971, #​2869, #​3024, #​3134)

Function signature fixes 🤖

• Fix accepted types for fputcsv fields parameter (#​451), thanks @​DaveLiddament!

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