[WIP] Move to trait based version `Expect` #389

Job	Run time
Rustfmt	7s
Clippy	15s
Check (nightly, ubuntu-latest, '')	16s
Check Tests (nightly, ubuntu-latest)	16s
Check (nightly, ubuntu-latest, polling)	21s
Test Suite (ubuntu-latest)	28s
Check Tests (nightly, macos-latest)	39s
Check (nightly, ubuntu-latest, async)	16s
Test Suite (ubuntu-latest, --features async)	21s
Check Tests (nightly, windows-latest)	42s
Check (nightly, ubuntu-latest, polling,async)	16s
Test Suite (macos-latest)	39s
Check Tests (stable, ubuntu-latest)	15s
Check (nightly, macos-latest, '')	25s
Test Suite (macos-latest, --features async)	29s
Check Tests (stable, macos-latest)	16s
Check (nightly, macos-latest, polling)	25s
Check (nightly, macos-latest, async)	1m 3s
Check (nightly, macos-latest, polling,async)	29s
Check Tests (stable, windows-latest)	55s
Check (nightly, windows-latest, '')	41s
Check (nightly, windows-latest, polling)	40s
Check (nightly, windows-latest, async)	50s
Check (nightly, windows-latest, polling,async)	51s
Check (stable, ubuntu-latest, '')	14s
Check (stable, ubuntu-latest, polling)	6s
Check (stable, ubuntu-latest, async)	9s
Check (stable, ubuntu-latest, polling,async)	9s
Check (stable, macos-latest, '')	16s
Check (stable, macos-latest, polling)	15s
Check (stable, macos-latest, async)	19s
Check (stable, macos-latest, polling,async)	23s
Check (stable, windows-latest, '')	1m 0s
Check (stable, windows-latest, polling)	54s
Check (stable, windows-latest, async)	37s
Check (stable, windows-latest, polling,async)	57s
	17m 14s

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