Add Swift Package Manager Support (closes #80) #84

Job	Run time
wakelock_plus analysis on stable	1m 12s
wakelock_plus_platform_interface analysis on stable	58s
wakelock_plus testing on beta with iPhone 14 Pro Simulator (17.2)	16m 58s
wakelock_plus_platform_interface testing on beta with iPhone 14 Pro Max Simulator (17.2)	2m 0s
wakelock_plus testing on stable with iPhone 14 Pro Simulator (17.2)	15m 0s
wakelock_plus analysis on beta	1m 41s
wakelock_plus testing on stable with iPhone 14 Pro Max Simulator (17.2)	14m 35s
wakelock_plus_platform_interface testing on stable with iPhone 14 Pro Max Simulator (17.2)	1m 13s
wakelock_plus_platform_interface testing on stable with iPhone 14 Pro Simulator (17.2)	1m 23s
wakelock_plus_platform_interface analysis on beta	1m 21s
wakelock_plus_platform_interface testing on beta with iPhone 14 Pro Simulator (17.2)	2m 9s
wakelock_plus testing on beta with iPhone 14 Pro Max Simulator (17.2)	15m 2s
	1h 13m 32s

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