Swift

Updated unit tests #99

Job	Run time
Android (6.1, x86_64)	3m 36s
Linux (swift:6.0.3, release, SWIFT_BUILD_DYNAMIC_LIBRARY=1)	12m 57s
macOS (debug, SWIFT_BUILD_DYNAMIC_LIBRARY=1)	1m 51s
Android (nightly-6.2, aarch64)	3m 36s
Linux (swift:6.0.3, release)	13m 7s
Android (6.1, aarch64)	4m 26s
Linux (swift:6.1.2, debug, SWIFT_BUILD_DYNAMIC_LIBRARY=1)	1m 54s
Linux (swift:6.1.2, release)	12m 40s
Linux (swift:6.0.3, debug, SWIFT_BUILD_DYNAMIC_LIBRARY=1)	1m 58s
macOS (debug)	1m 44s
Linux (swift:6.1.2, release, SWIFT_BUILD_DYNAMIC_LIBRARY=1)	11m 15s
Linux (swift:6.1.2, debug)	1m 52s
macOS (release, SWIFT_BUILD_DYNAMIC_LIBRARY=1)	7m 55s
Linux (swift:6.0.3, debug)	1m 53s
Android (nightly-6.2, x86_64)	3m 51s
macOS (release)	10m 19s
	1h 34m 54s

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