Version 4.0.0-alpha.1

Major

• New API to support the GraphQL multipart request spec v2.0.0-alpha.2. Files no longer upload to the filesystem; readable streams are used in resolvers instead. Fixes #13 via #22.
• Export a new Upload scalar type to use in place of the old Upload input type. It represents a file upload promise that resolves an object containing stream, filename, mimetype and encoding.
• Deprecated the uploadDir middleware option.
• graphql is now a peer dependency.

Minor

• Added new maxFieldSize, maxFileSize and maxFiles middleware options.

Patch

• Middleware are now arrow functions.