Add support for rust-miniscript #40

Job	Run time
Prepare	3s
Test - stable toolchain (minimal)	24s
Docs - stable toolchain (recent)	19s
Test - stable toolchain (recent)	44s
Integration tests - stable toolchain (26_0)	1m 46s
Integration tests - stable toolchain (25_2)	1m 35s
Integration tests - stable toolchain (25_1)	51s
Integration tests - stable toolchain (25_0)	2m 25s
Integration tests - stable toolchain (24_2)	1m 29s
Integration tests - stable toolchain (24_1)	1m 34s
Integration tests - stable toolchain (24_0_1)	1m 37s
Integration tests - stable toolchain (23_2)	46s
Integration tests - stable toolchain (23_1)	52s
Integration tests - stable toolchain (23_0)	1m 47s
Integration tests - stable toolchain (22_1)	1m 33s
Integration tests - stable toolchain (22_0)	1m 15s
Integration tests - stable toolchain (0_21_2)	1m 36s
Integration tests - stable toolchain (0_20_2)	55s
Integration tests - stable toolchain (0_19_1)	2m 3s
Integration tests - stable toolchain (0_18_1)	1m 14s
Integration tests - stable toolchain (0_17_2)	51s
Docs - nightly toolchain (recent)	24s
Lint - nightly toolchain (recent)	41s
Test - nightly toolchain (minimal)	31s
Test - nightly toolchain (recent)	29s
	27m 44s

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