Merge pull request #5 from loopieio/error-messages

Error messages

targeting both netstandard 2.0 and 2.1

breaking - fixed typo in variable name

Added ongoing as a status, and reordered statuses

added parameterless constructor for PostmatesAccount

added yaml properties for postmates account. new release

Merge branch 'master' of https://github.com/loopieio/Postmates.NET

Added xlarge as delivery size option