v3.2.0

• If dictionary decoder expects an array but doesn't find one then stick object found inside an array. Fixes issue in API Gateway where single element arrays are just returned as the element.
• AWSClient.init() has a new sessionToken parameter.
• Add session tokens to headers before constructing authorization header.
• XML Parser ignores newlines as well as whitespace in between XML nodes.
• Don't encode single or double quotation marks in XML
• Added general purpose validation code to be used by auto-generated validate() functions in aws-sdk-swift.
• Added AWSShape.idempotencyToken() for auto-generating idempotency tokens.
• Added support for OpenSSL 1.1 while still supporting earlier versions.
• New me-south-1 region is available.
• Added the ability to edit response bodies before they are decoded into an AWSShape.