Merge pull request rust-lang#1960 from ehuss/bump-version

Update to 0.4.25

Merge pull request rust-lang#1956 from ehuss/bump-version

Update to 0.4.24

Merge pull request rust-lang#1953 from ehuss/bump-version

Update to 0.4.23

Merge pull request rust-lang#1938 from ehuss/bump-version

Update to 0.4.22

Merge pull request rust-lang#1863 from ehuss/bump-version

Update to 0.4.21

Merge pull request rust-lang#1857 from ehuss/bump-version

Update to 0.4.20

Merge pull request rust-lang#1840 from ehuss/fix-lock

Fix Cargo.lock for version bump.

Merge pull request rust-lang#1787 from ehuss/bump-version

Update to 0.4.18

Merge pull request rust-lang#1776 from ehuss/bump-version

Update to 0.4.17

Merge pull request rust-lang#1773 from ehuss/bump-version

Update to 0.4.16