Change WordPressComRESTAPIVersion from 1_2 to 2_0 in ThemeServiceRemote, getWPThemesPage with search method

Author: pmusolino

Sources/WordPressKit/Services/ThemeServiceRemote.m

@@ -108,7 +108,7 @@ - (NSProgress *)getWPThemesPage:(NSInteger)page
     NSParameterAssert([search isKindOfClass:[NSString class]]);
 
     NSString *requestUrl = [self pathForEndpoint:@"themes"
-                                     withVersion:WordPressComRESTAPIVersion_1_2];
+                                     withVersion:WordPressComRESTAPIVersion_2_0];
 
     NSDictionary *parameters = @{ThemeRequestTierKey: freeOnly ? ThemeRequestTierFreeValue : ThemeRequestTierAllValue,
                                  ThemeRequestNumberKey: @(ThemeRequestNumberValue),