[WIP] Move to trait based version `Expect` #388

Job	Run time
Rustfmt	9s
Check Tests (nightly, ubuntu-latest)	18s
Clippy	23s
Check Tests (nightly, macos-latest)	25s
Check (nightly, ubuntu-latest, '')	17s
Check Tests (nightly, windows-latest)	45s
Check (nightly, ubuntu-latest, polling)	19s
Test Suite (ubuntu-latest)	20s
Check Tests (stable, ubuntu-latest)	20s
Check (nightly, ubuntu-latest, async)	18s
Test Suite (ubuntu-latest, --features async)	24s
Check (nightly, ubuntu-latest, polling,async)	20s
Check Tests (stable, macos-latest)	19s
Test Suite (macos-latest)	20s
Check (nightly, macos-latest, '')	26s
Check Tests (stable, windows-latest)	1m 37s
Test Suite (macos-latest, --features async)	20s
Check (nightly, macos-latest, polling)	25s
Check (nightly, macos-latest, async)	26s
Check (nightly, macos-latest, polling,async)	39s
Check (nightly, windows-latest, '')	1m 28s
Check (nightly, windows-latest, polling)	1m 27s
Check (nightly, windows-latest, async)	2m 14s
Check (nightly, windows-latest, polling,async)	50s
Check (stable, ubuntu-latest, '')	15s
Check (stable, ubuntu-latest, polling)	23s
Check (stable, ubuntu-latest, async)	19s
Check (stable, ubuntu-latest, polling,async)	23s
Check (stable, macos-latest, '')	16s
Check (stable, macos-latest, polling)	22s
Check (stable, macos-latest, async)	17s
Check (stable, macos-latest, polling,async)	48s
Check (stable, windows-latest, '')	2m 40s
Check (stable, windows-latest, polling)	1m 17s
Check (stable, windows-latest, async)	2m 0s
Check (stable, windows-latest, polling,async)	2m 40s
	26m 29s

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