chore(deps): update dependency cloudnative.cloudevents to v2

[lucca-renovate]

Description

This PR contains the following updates:

Package	Type	Update	Change
CloudNative.CloudEvents (source)	nuget	major	1.3.80 -> 2.7.1

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Release Notes

cloudevents/sdk-csharp (CloudNative.CloudEvents)

v2.7.1: All packages version 2.7.1

v2.7.0: All packages version 2.7.0

v2.6.0: All packages version 2.6.0

v2.5.1: All packages version 2.5.1

v2.5.0: All packages version 2.5.0

Release 2.5.0

Changes since 2.4.0:

• Dependencies: update dependencies in CloudNative.CloudEvents.AspNetCore:
  • Remove dependency on Microsoft.AspNetCore.Mvc.Core (as we don't use it)
  • Update dependency on Microsoft.AspNetCore.Http to 2.1.34
  • Explicitly add dependency on System.Text.Encodings.Web 6.0.0 to avoid security issue in older version

No APIs have changed, but this is a minor release due to the significant dependency changes.

v2.4.0: All packages version 2.4.0

Release 2.4.0

Changes since 2.3.1:

• Feature: Implement underscore prefixes for AMQP (see history) (#​236)
• Feature: Allow empty payloads in Kafka (#​224)
• Feature: Implement conversions to and from JObject/JsonElement in JsonEventFormatter (#​234, part of #​231)
• Bug fix: Observe JSON serializer options in JsonEventFormat (#​226, fixes #​225)
• Bug fix: Put AvroEventFormatter in the right namespace (#​220, fixes #​219)
• Bug fix: Use content headers when parsing HTTP requests/responses (#​222, fixes #​221)
• Bug fix: Perform release builds with ContinuousIntegrationBuild=true (#​223, fixes #​175)

v2.3.1: All packages version 2.3.1

Changes since 2.3.0:

• Bug fix: ignore the charset when determining the content type for decoding JSON (#​216)
• Bug fix: make the NuGet package deterministic (#​175)

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