Get rid of OpenAPI namespace because a compiler bug was making it more hassle than it was worth.

Sources/JSONAPIArbitrary/Id+Arbitrary.swift

@@ -0,0 +1,15 @@
+//
+//  Id+Arbitrary.swift
+//  JSONAPIArbitrary
+//
+//  Created by Mathew Polzin on 1/14/19.
+//
+
+import SwiftCheck
+import JSONAPI
+
+extension Id: Arbitrary where RawType: Arbitrary {
+	public static var arbitrary: Gen<Id<RawType, IdentifiableType>> {
+		return RawType.arbitrary.map { Id(rawValue: $0) }
+	}
+}