Merge pull request #105 from eyre-rs/color-spantrace #268

Job	Run time
Check (stable)	23s
Test Suite (stable)	1m 0s
Clippy (stable)	40s
Rustfmt (stable)	20s
Test Suite (stable, --no-default-features)	55s
Test Suite	4m 39s
Test Suite (stable, --features track-caller)	1m 7s
Test Suite (--no-default-features)	4m 33s
Miri	1m 34s
Test Suite (ubuntu-latest)	57s
Test Suite (stable, --features pyo3)	56s
Test Suite (--features track-caller)	4m 38s
Test Suite (windows-latest)	2m 32s
Test Suite (stable, --features auto-install)	55s
Test Suite (--features auto-install)	5m 52s
Test Suite (macOS-latest)	3m 37s
Test Suite (stable, --all-features)	1m 8s
Test Suite (beta)	1m 4s
Test Suite (beta, --no-default-features)	58s
Test Suite (beta, --features track-caller)	53s
Test Suite (beta, --features pyo3)	59s
Test Suite (beta, --features auto-install)	56s
Test Suite (beta, --all-features)	58s
Test Suite (nightly)	1m 8s
Test Suite (nightly, --no-default-features)	1m 8s
Test Suite (nightly, --features track-caller)	1m 16s
Test Suite (nightly, --features pyo3)	1m 32s
Test Suite (nightly, --features auto-install)	1m 6s
Test Suite (nightly, --all-features)	1m 21s
	49m 5s

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