Add support for devicetrees #5

Job	Run time
Actionlint	1m 21s
Check Linux Packaging	5m 43s
Test x86_64-unknown-linux-gnu	5m 53s
Rustfmt	1m 30s
Test x86_64-apple-darwin	8m 34s
Output Regression Test	6m 8s
Test Linux (latest stable Rust)	2m 43s
Test x86_64-pc-windows-msvc	7m 8s
Test with MIME database	5m 47s
Test aarch64-unknown-linux-gnu	7m 23s
Test x86_64-unknown-linux-musl	6m 35s
	58m 45s

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