refactor!(core): make it all async

[aasseman]

BREAKING CHANGE: all the traits are now async

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Pull Request Test Coverage Report for Build 5697013184

• 129 of 150 (86.0%) changed or added relevant lines in 13 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.8%) to 81.905%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tap_core/src/adapters/test/collateral_adapter_mock.rs	15	16	93.75%
tap_core/src/adapters/test/receipt_storage_adapter_mock.rs	29	30	96.67%
tap_core/src/tap_receipt/received_receipt.rs	11	15	73.33%
tap_core/src/tap_receipt/receipt_auditor.rs	28	34	82.35%
tap_core/src/tap_manager/manager.rs	22	31	70.97%
<!--	Total:	129	150	86.0%	-->

Totals
Change from base Build 5696986140:	-0.8%
Covered Lines:	1032
Relevant Lines:	1260

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💛 - Coveralls

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