Convert ServiceRemoteWordPressComRESTApiVersion to modern ObjC enum

This should help with isolating the value so that we can further extract
the path logic in the Swift implementation.

Author: mokagio

Sources/WordPressKit/Services/ServiceRemoteWordPressComREST.h

@@ -3,12 +3,13 @@
 
 @class WordPressComRestApi;
 
-typedef NSInteger NS_TYPED_ENUM ServiceRemoteWordPressComRESTApiVersion;
-extern ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_0;
-extern ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_1;
-extern ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_2;
-extern ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_3;
-extern ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_2_0;
+typedef NS_ENUM(NSInteger, ServiceRemoteWordPressComRESTApiVersion) {
+    ServiceRemoteWordPressComRESTApiVersion_1_0 = 1000,
+    ServiceRemoteWordPressComRESTApiVersion_1_1 = 1001,
+    ServiceRemoteWordPressComRESTApiVersion_1_2 = 1002,
+    ServiceRemoteWordPressComRESTApiVersion_1_3 = 1003,
+    ServiceRemoteWordPressComRESTApiVersion_2_0 = 2000
+};
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -50,7 +51,8 @@ NS_ASSUME_NONNULL_BEGIN
  *  @returns    The request URL.
  */
 - (NSString *)pathForEndpoint:(NSString *)endpoint
-                  withVersion:(ServiceRemoteWordPressComRESTApiVersion)apiVersion;
+                  withVersion:(ServiceRemoteWordPressComRESTApiVersion)apiVersion
+NS_SWIFT_NAME(path(forEndpoint:withVersion:));
 
 @end
 

Sources/WordPressKit/Services/ServiceRemoteWordPressComREST.m

@@ -1,12 +1,6 @@
 #import "ServiceRemoteWordPressComREST.h"
 #import "WPKit-Swift.h"
 
-ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_0 = 1000;
-ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_1 = 1001;
-ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_2 = 1002;
-ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_1_3 = 1003;
-ServiceRemoteWordPressComRESTApiVersion const ServiceRemoteWordPressComRESTApiVersion_2_0 = 2000;
-
 static NSString* const ServiceRemoteWordPressComRESTApiVersionStringInvalid = @"invalid_api_version";
 static NSString* const ServiceRemoteWordPressComRESTApiVersionString_1_0 = @"rest/v1";
 static NSString* const ServiceRemoteWordPressComRESTApiVersionString_1_1 = @"rest/v1.1";