Version 1.9.0

New functionality

• Add support of Async API calls in .NET Core
• Add expiresAt to DownloadPrivate
• Add DerivedNextCursor to GetResourceParams Admin API
• Add ListResourcesByContext to Admin API
• Add Live parameter to UploadPreset
• Add AudioFrequency enumeration
• Add Format parameter to SpriteParams
• Add supported video codecs
• Add supported Gravity values
• Add Named parameter to GetTransformResult
• Add VerifyApiResponseSignature and VerifyNotificationSignature functions
• Add XML documentation

Other Changes

• Fix typo in QualityOverride parameter name
• Fix acl and url escaping in AuthToken generation
• Fix project types for VS for Mac
• Extract integration tests into separate assembly
• Fix build.ps1 script