Fuzz

bitcoin: Depend on and export hex-conservative #1792

Job	Run time
fuzz (deser_net_msg)	1m 51s
fuzz (deserialize_address)	1m 50s
fuzz (deserialize_amount)	1m 46s
fuzz (deserialize_block)	1m 51s
fuzz (deserialize_psbt)	1m 50s
fuzz (deserialize_script)	2m 0s
fuzz (deserialize_transaction)	1m 56s
fuzz (deserialize_prefilled_transaction)	1m 46s
fuzz (deserialize_witness)	1m 49s
fuzz (outpoint_string)	1m 46s
fuzz (script_bytes_to_asm_fmt)	1m 45s
verify-execution	4s
	20m 14s

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