Update async-tungstenite requirement from 0.18 to 0.20

[dependabot[bot]]

Updates the requirements on async-tungstenite to permit the latest version.

Changelog

Sourced from async-tungstenite's changelog.

[0.20.0] - 2023-02-10

Changed

• Update to gio/glib 0.17.
• Update to async-tls 0.12 and env-logger 0.10.

[0.19.0] - 2022-12-11

Changed

• Update to tungstenite 0.18 and make the "handshake" feature optional but enabled by default.

[0.18.0] - 2022-10-24

Changed

• Update to gio/glib 0.16.

[0.17.2] - 2022-03-23

Fixed

• The Stream implementation on WebSocketStream now implements FusedStream and will always return None after an error was returned or the stream was closed cleanly.
• Fix autobahn testsuite.

[0.17.1] - 2022-03-01

Fixed

• Fix poll_close returning WouldBlock error kind.
• Fix a couple of minor clippy warnings.

[0.17.0] - 2022-02-17

Changed

• Update to tungstenite 0.17.
• Update to gio/glib 0.15.
• Update to async-native-tls 0.4.

[0.16.1] - 2021-12-06

Fixed

• Fix connecting to URLs containing plain IPv6 addresses in brackets.

[0.16.0] - 2021-11-06

Changed

• Update to tungstenite 0.16, rusttls 0.20, tokio-rustls 0.23, etc.

[0.15.0] - 2021-09-09

Fixed

• Reduce crate package size.
• Fix and clean up autobahn tests.

Changed

• Update to tungstenite 0.15.

[0.14.0] - 2021-07-05

Changed

... (truncated)

Commits

• da62f07 Release 0.20.0
• fa9d6c0 Update async-tls to 0.12, env-logger to 0.10 and glib/gio to 0.17
• 4e59da8 Release 0.19.0
• aed66e9 Fix compilation of tests without handshake feature
• 4474822 ci: Also check running with --no-default-features
• e730269 Feature-gate handshakes / communication test
• 1dd92fc Make handshake dependencies optional.
• 952681e Fix the unreachable test url
• See full diff in compare view

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[ebkalderon]

Will handle this dev-dependency update in the next release.

[ebkalderon]

Since ws_stream_tungstenite hasn't updated to async-tungstenite 0.20 yet, we cannot update this dev-dependency at this time.

[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.