Update to SFML 3.x vector-based `sf::Rect` #418

Job	Run time
clang-format	9s
Windows MSVC Shared Release	2m 0s
Windows MSVC Shared Debug	2m 5s
Windows MSVC Static Release	2m 31s
Windows MSVC Static Debug	2m 44s
Windows ClangCL Shared Release	2m 54s
Windows ClangCL Shared Debug	2m 43s
Windows ClangCL Static Release	4m 24s
Windows ClangCL Static Debug	4m 8s
Windows Clang Shared Release	1m 53s
Windows Clang Shared Debug	1m 43s
Windows Clang Static Release	2m 13s
Windows Clang Static Debug	2m 16s
Linux GCC Shared Release	55s
Linux GCC Shared Debug	43s
Linux GCC Static Release	1m 6s
Linux GCC Static Debug	1m 3s
Linux Clang Shared Release	1m 14s
Linux Clang Shared Debug	46s
Linux Clang Static Release	1m 24s
Linux Clang Static Debug	1m 36s
macOS Clang Shared Release	1m 15s
macOS Clang Shared Debug	54s
macOS Clang Static Release	1m 16s
macOS Clang Static Debug	1m 6s
	45m 1s

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