1.6.0 release

Auto merge of rust-lang#30696 - steveklabnik:gh30655, r=brson

Fixes rust-lang#30655

1.5.0 release

1.4.0 release

1.3.0 release

1.2.0 release

1.1.0 release

1.0.0 release

1.0.0-alpha.2 release