Add SyncConnectionWrapper type #206

Job	Run time
Check Minimal supported rust version (1.65.0)	23s
Check rustfmt style && run clippy	8s
Check (stable, postgres, ubuntu-latest)	29s
Check (stable, postgres, macos-latest)	20s
Check (stable, postgres, windows-latest)	6m 48s
Check (stable, mysql, ubuntu-latest)	16s
Check (stable, mysql, macos-latest)	12s
Check (stable, mysql, windows-latest)	2m 23s
Check (beta, postgres, ubuntu-latest)	34s
Check (beta, postgres, macos-latest)	29s
Check (beta, postgres, windows-latest)	8m 58s
Check (beta, mysql, ubuntu-latest)	16s
Check (beta, mysql, macos-latest)	11s
Check (beta, mysql, windows-latest)	2m 14s
Check (nightly, postgres, ubuntu-latest)	32s
Check (nightly, postgres, macos-latest)	28s
Check (nightly, postgres, windows-latest)	5m 2s
Check (nightly, mysql, ubuntu-latest)	19s
Check (nightly, mysql, macos-latest)	12s
Check (nightly, mysql, windows-latest)	2m 7s
	32m 21s

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