Ensure JSON output is consistently ordered #3286

Job	Run time
Actionlint	1m 12s
Rustfmt	1m 19s
Check Linux Packaging	4m 10s
Test x86_64-unknown-linux-gnu	4m 9s
Test x86_64-apple-darwin	6m 5s
Output Regression Test	4m 24s
Test Linux (latest stable Rust)	2m 18s
Test with MIME database	3m 43s
Test x86_64-pc-windows-msvc	5m 6s
Test aarch64-unknown-linux-gnu	5m 38s
Test aarch64-apple-darwin	3m 40s
Test x86_64-unknown-linux-musl	4m 20s
	46m 4s

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