libp2p-dns 0.31.0

DNS transport implementation for libp2p
Documentation
# 0.31.0 [2022-01-27]

- Update dependencies.

- Migrate to Rust edition 2021 (see [PR 2339]).

[PR 2339]: https://github.com/libp2p/rust-libp2p/pull/2339

# 0.30.0 [2021-11-01]

- Make default features of `libp2p-core` optional.
  [PR 2181]https://github.com/libp2p/rust-libp2p/pull/2181

- Update dependencies.

# 0.29.0 [2021-07-12]

- Update dependencies.

# 0.28.1 [2021-04-01]

- Update dependencies.

- Remove `fqdn` function optimization conflicting with non fully qualified
  domain name resolution [PR
  2027](https://github.com/libp2p/rust-libp2p/pull/2027).

# 0.28.0 [2021-03-17]

- Update `libp2p-core`.

- Add support for resolving `/dnsaddr` addresses.

- Use `trust-dns-resolver`, removing the internal thread pool and
  expanding the configurability of `libp2p-dns` by largely exposing the
  configuration of `trust-dns-resolver`.
  [PR 1927]https://github.com/libp2p/rust-libp2p/pull/1927

# 0.27.0 [2021-01-12]

- Update dependencies.

# 0.26.0 [2020-12-17]

- Update `libp2p-core`.

# 0.25.0 [2020-11-25]

- Update `libp2p-core`.

# 0.24.0 [2020-11-09]

- Update dependencies.

# 0.23.0 [2020-10-16]

- Bump `libp2p-core` dependency.

# 0.22.0 [2020-09-09]

- Bump `libp2p-core` dependency.

# 0.21.0 [2020-08-18]

- Bump `libp2p-core` dependency.

# 0.20.0 [2020-07-01]

- Dependency and documentation updates.