Various fixups

[jonhoo]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.6%. Comparing base (af5ad73) to head (3cd80e6).

Additional details and impacted files

Files	Coverage Δ
src/client.rs	92.8% <ø> (ø)
src/client_builder.rs	96.1% <ø> (ø)
src/error.rs	21.4% <ø> (ø)
src/extensions/idle.rs	0.0% <ø> (ø)
src/extensions/list_status.rs	87.9% <100.0%> (ø)
src/extensions/metadata.rs	92.6% <100.0%> (ø)
src/parse.rs	89.4% <ø> (ø)
src/types/acls.rs	98.4% <100.0%> (ø)
src/types/appended.rs	100.0% <ø> (ø)
src/types/capabilities.rs	55.8% <100.0%> (ø)
... and 5 more

[jonhoo]

Published as 3.0.0-alpha.13 🎉