Add support for rust-miniscript #39

Job	Run time
Test - stable toolchain (minimal)	29s
Docs - stable toolchain (recent)	27s
Prepare	8s
Test - stable toolchain (recent)	23s
Integration tests - stable toolchain (26_0)	1m 41s
Integration tests - stable toolchain (25_2)	51s
Integration tests - stable toolchain (25_1)	1m 39s
Integration tests - stable toolchain (25_0)	1m 38s
Integration tests - stable toolchain (24_2)	1m 7s
Integration tests - stable toolchain (24_1)	2m 18s
Integration tests - stable toolchain (24_0_1)	47s
Integration tests - stable toolchain (23_2)	55s
Integration tests - stable toolchain (23_1)	48s
Integration tests - stable toolchain (23_0)	1m 36s
Integration tests - stable toolchain (22_1)	48s
Integration tests - stable toolchain (22_0)	1m 6s
Integration tests - stable toolchain (0_21_2)	1m 33s
Integration tests - stable toolchain (0_20_2)	1m 23s
Integration tests - stable toolchain (0_19_1)	1m 33s
Integration tests - stable toolchain (0_18_1)	1m 55s
Integration tests - stable toolchain (0_17_2)	2m 4s
Test - nightly toolchain (minimal)	31s
Docs - nightly toolchain (recent)	30s
Test - nightly toolchain (recent)	28s
Lint - nightly toolchain (recent)	44s
	27m 22s

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