WIP: try on personal fork #3

Job	Run time
build_all_features (linux)	2m 35s
build_no_default_features (linux)	2m 5s
build_all_features (windows)	5m 19s
build_feature_electrum (linux)	2m 14s
build_no_default_features (windows)	6m 12s
build_feature_esplora (linux)	2m 22s
build_feature_electrum (windows)	6m 3s
build_all_features (macos)	2m 42s
build_no_default_features (macos)	2m 50s
build_feature_esplora (windows)	5m 2s
build_feature_electrum (macos)	3m 47s
build_feature_esplora (macos)	2m 44s
	43m 55s

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