add autofield :ws_disconnected #861

Job	Run time
build	3m 8s
Julia 1.6 - ubuntu-latest - x64	1m 59s
Julia 1.6 - macOS-latest - x64	2m 36s
Julia 1.6 - windows-latest - x64	12m 34s
Julia 1 - ubuntu-latest - x64	3m 55s
Julia 1 - macOS-latest - x64	6m 1s
Julia 1 - windows-latest - x64	5m 18s
Julia pre - ubuntu-latest - x64	3m 54s
Julia pre - macOS-latest - x64	6m 18s
Julia pre - windows-latest - x64	4m 38s
Julia nightly - ubuntu-latest - x64	3m 49s
Julia nightly - macOS-latest - x64	4m 16s
Julia nightly - windows-latest - x64	4m 47s
	1h 3m 13s

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