Incompatible with UWP

[markval]

In Unity while building for Windows Univeral 10.

Error: type System.Runtime.Serialization.SerializationInfo doesn't exist in target framework

Among others, SerializationInfo does not exist in WP8 or WinRT.
There's a need to create a dll for the Editor and another one for UWP probably using .NET core..

Affected:
AWSSDK.Core.dll
AWSSDK.S3.dll
AWSSDK.CognitoIdentity.dll

[minbi]

Thank you for bring this to our attention.