1.7.0 release

Auto merge of rust-lang#31882 - Manishearth:rollup, r=Manishearth

- Successful merges: rust-lang#31362, rust-lang#31793, rust-lang#31800, rust-lang#31809, rust-lang#31818, rust-lang#31827, rust-lang#31831, rust-lang#31835, rust-lang#31837, rust-lang#31846
- Failed merges:

1.6.0 release

1.5.0 release

1.4.0 release

1.3.0 release

1.2.0 release

1.1.0 release

1.0.0 release