v3.0.0 - Gatsby v4 support

[cloudinary-raae]

Fixes:

• Direct mutation of nodes not allowed #156

BREAKING CHANGES:

• CloudinaryAsset nodes are not added for existing assets described by a content node
• When uploading remote images the relationship between parent and child node must be handled manually
• gatsbyImageData, fluid and fixed resolvers are only added to GraphQL Types configured using the transformTypes

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This discussion was created from the release v3.0.0 - Gatsby v4 support.