Update bitcoin_hashes to 1.0 #749

Job	Run time
Docs - nightly toolchain	29m 26s
Docs - stable toolchain	2m 44s
Lint - nightly toolchain	2m 27s
Test - stable toolchain (recent)	6m 22s
Test - nightly toolchain (recent)	6m 55s
Bench - nightly toolchain	5m 25s
Check WASM	52s
Cross test	1m 39s
Test 32-bit version	1m 9s
Test - msrv toolchain (recent)	1m 46s
	58m 45s

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