fix: Add swig as build dependency #320

Job	Run time
find_package/linux/Release	2m 47s
find_package/linux/Debug	1m 59s
find_package/linux/libcxx/Release	3m 21s
find_package/linux/libcxx/Debug	3m 12s
find_package/macos/Release	5m 8s
find_package/macos/Debug	3m 51s
find_package/win/Release	10m 17s
find_package/win/Debug	6m 23s
find_library/linux/Release	2m 47s
find_library/linux/Debug	3m 11s
find_library/linux/libcxx/Release	4m 36s
find_library/linux/libcxx/Debug	4m 22s
find_library/macos/Release	4m 46s
find_library/macos/Debug	4m 0s
find_library/win/Release	4m 17s
find_library/win/Debug	4m 6s
singleheader/linux/Release	6m 40s
singleheader/linux/Debug	3m 38s
singleheader/linux/libcxx/Release	3m 40s
singleheader/linux/libcxx/Debug	3m 29s
singleheader/macos/Release	4m 39s
singleheader/macos/Debug	3m 54s
singleheader/win/Release	9m 10s
singleheader/win/Debug	5m 8s
	1h 49m 21s

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