Bump YamlDotNet from 3.6.1 to 5.1.0 in /buildtools/CustomTasks

[dependabot]

Bumps YamlDotNet from 3.6.1 to 5.1.0.

Release notes

Sourced from YamlDotNet's releases.

v5.1.0

Improvements:

• Add interfaces for serializer and deserializer (fixes #350).

Fixes:

• Fixed issue #348 that caused the assembly to have version 0.0.0.0.

Metadata update

This release adds the repository location to the package metadata. No functional changes were made.

Security issues and dropping legacy behaviors

/!\ This release fixes a security issue. It is strongly recommended to upgrade, mainly if you are parsing documents from sources that you do not trust.

Many thanks to Kurt Boberg, from the DocuSign Application Security Team, who identified this issue and provided feedback on mitigation strategies.

• Remove the legacy backwards-compatibe syntax that enabled to create Serializer and Deserializer directly then changing their configutation.
  In most cases, the calls to the constructors should be replaced by instantiations of SerializerBuilder and DeserializerBuilder. These can be configured at will, then used to create instances of (De)serializer. It is still possible to use the default constructors, if no configuration is needed.

• Drop support for specifying arbitrary type names in tags.
  Support for automatically resolving a fully qualified type name from a tag has been discontinued. That feature was poorly designed and not standard.
  During deserialization, each tag mapping must be explicitly registered. During serialization, when using the EnsureRoundtrip method, it is necessary to register tag mappings for each type that will require a tag, that is, any type that is used as the value of a property with a different declared type.

• Fix bug where deserialized values were not being converted to the destination type.

  var sut = new DeserializerBuilder()
      .WithTagMapping("!dbl", typeof(DoublyConverted))
      .Build();
  // The scalar "hello" will first be converted to DoublyConverted
  // then that value will be converted to int.
  var result = sut.Deserialize<int>("!dbl hello");
  Assert.Equal(5, result);

Add support for (de)serialization of System.Type

No release notes provided.

Cleanup the project

... (truncated)

Commits

• 34215af Prepare release 5.1.0
• 50dadfb Merge branch 'add-interfaces' of https://github.com/grofit/YamlDotNet into gr...
• bc681de Fix missing assembly version
• c0c446e Updated to add interfaces for serializers
• f9f69e9 Give proper credit to Kurt Boberg
• 5ec2dd7 Merge pull request #330 from samneirinck/source-location
• e32473a Add repository location
• e024a32 Prepare release 5.0.0
• 0ce8ac1 Drop support for specifying arbitrary type names in tags
• c8df563 Remove legacy backwards compatibility
• Additional commits viewable in compare view

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