Support converting between `anyhow::Error` and `eyre::Report` automatically with `?` #505

Job	Run time
Test Suite (ubuntu-latest)	14s
Test Suite (stable)	1s
Test Suite (windows-latest)	16s
Clippy (stable)	21s
Check (stable)	11s
Test Suite (macOS-latest)	19s
Test Suite (stable, --no-default-features)	1s
Test Suite (stable, --no-default-features --features track-caller)	1s
Test Suite (stable, --no-default-features --features auto-install)	1s
Rustfmt (stable)	9s
Miri	46s
Test Suite (stable, --features pyo3)	1s
Test Suite	2m 41s
Test Suite (stable, --all-features)	1s
Test Suite (--no-default-features)	2m 45s
Test Suite (beta)	19s
Test Suite (--no-default-features --features track-caller)	2m 46s
Test Suite (beta, --no-default-features)	17s
Test Suite (--no-default-features --features auto-install)	2m 41s
Test Suite (beta, --no-default-features --features track-caller)	20s
Test Suite (beta, --no-default-features --features auto-install)	21s
Test Suite (beta, --features pyo3)	19s
Test Suite (beta, --all-features)	19s
Test Suite (nightly)	21s
Test Suite (nightly, --no-default-features)	3s
Test Suite (nightly, --no-default-features --features track-caller)	5s
Test Suite (nightly, --no-default-features --features auto-install)	2s
Test Suite (nightly, --features pyo3)	21s
Test Suite (nightly, --all-features)	21s
	16m 23s

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