Taproot support #1828

Job	Run time
linter	35s
linter_gui	1m 32s
unit_tests (1.63, ubuntu-latest)	2m 53s
unit_tests (1.63, macOS-latest)	4m 16s
unit_tests (1.63, windows-latest)	3m 49s
unit_tests (nightly, ubuntu-latest)	57s
unit_tests (nightly, macOS-latest)	1m 30s
unit_tests (nightly, windows-latest)	1m 54s
unit_tests_gui (1.65.0, ubuntu-latest)	4m 53s
unit_tests_gui (1.65.0, macOS-latest)	7m 59s
unit_tests_gui (1.65.0, windows-latest)	6m 21s
unit_tests_gui (nightly, ubuntu-latest)	2m 34s
unit_tests_gui (nightly, macOS-latest)	5m 52s
unit_tests_gui (nightly, windows-latest)	5m 23s
	50m 28s

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