ci: upgrade & improvements (#462) · Vonage/vonage-dotnet-sdk@2b5fad7

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/setup-java@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

'ParsingFailure' overrides Object.Equals(object o) but does not override Object.GetHashCode()

Update this implementation of 'ISerializable' to conform to the recommended serialization pattern.

Update this implementation of 'ISerializable' to conform to the recommended serialization pattern.

Update this implementation of 'ISerializable' to conform to the recommended serialization pattern.

Update this implementation of 'ISerializable' to conform to the recommended serialization pattern.

This struct overrides 'Equals' and should therefore also override 'GetHashCode'.

Extract this nested ternary operation into an independent statement.

'ParsingFailure' overrides Object.Equals(object o) but does not override Object.GetHashCode()

Update this implementation of 'ISerializable' to conform to the recommended serialization pattern.

Update this implementation of 'ISerializable' to conform to the recommended serialization pattern.

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