Update tungstenite requirement from ^0.13.0 to ^0.14.0

[dependabot]

Updates the requirements on tungstenite to permit the latest version.

Changelog

Sourced from tungstenite's changelog.

0.14.0

• Use rustls-native-certs instead of webpki-root when rustls-tls feature is enabled.
• Don't use native-tls as a default feature (see #202 for more details).
• New fast and safe implementation of the reading buffer (replacement for the input_buffer).
• Remove some errors from the Error enum that can't be triggered anymore with the new buffer implementation.

0.13.0

• Add CapacityError, UrlError, and ProtocolError types to represent the different types of capacity, URL, and protocol errors respectively.
• Modify variants Error::Capacity, Error::Url, and Error::Protocol to hold the above errors types instead of string error messages.
• Add handshake::derive_accept_key to facilitate external handshakes.
• Add support for rustls as TLS backend. The previous tls feature flag is now removed in favor of native-tls and rustls-tls, which allows to pick the TLS backend. The error API surface had to be changed to support the new error types coming from rustls related crates.

0.12.0

• Add facilities to allow clients to follow HTTP 3XX redirects.
• Allow accepting unmasked clients on the server side to be compatible with some legacy / invalid clients.
• Update of dependencies and documentation fixes.

Commits

• 6f56461 Update the changelog
• 32f4106 Bump version
• 25a7f9e Trigger the CI/CD for Travis
• c742916 Merge pull request #214 from snapview/faster-input-buffer
• 83722c2 Clean up the read portion of the buffer
• ddddd79 Implement benchmarks for buffers
• 2787031 Replace InputBuffer with a faster alternative
• 8c3172c Merge pull request #205 from yusdacra/master
• a729b37 Update src/client.rs
• 9a4fff4 Merge pull request #207 from teymour-aldridge/patch-1
• Additional commits viewable in compare view

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[danielvschoor]

As far as I can tell, the improvements made on this version results in about 2x performance increase in tungstenite:
PR