Fuzz

Merge ElementsProject/elements-miniscript#95: Remove inner checksum i… #161

Job	Run time
fuzz (roundtrip_miniscript_str)	3m 26s
fuzz (roundtrip_miniscript_script)	3m 21s
fuzz (parse_descriptor)	3m 27s
fuzz (roundtrip_semantic)	3m 17s
fuzz (parse_descriptor_secret)	3m 20s
fuzz (roundtrip_descriptor)	3m 27s
fuzz (roundtrip_concrete)	3m 29s
fuzz (compile_descriptor)	3m 26s
fuzz (roundtrip_confidential)	3m 39s
verify-execution	4s
	30m 56s

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