fix: endpoint version in method testThatGetThemesWorks

Author: pmusolino

Tests/WordPressKitTests/Tests/ThemeServiceRemoteTests.m

@@ -196,7 +196,7 @@ - (void)testThatGetThemesWorks
     XCTAssertNoThrow(service = [[ThemeServiceRemote alloc] initWithWordPressComRestApi:api]);
 
     NSString *url = [service pathForEndpoint:@"themes"
-                                 withVersion:WordPressComRESTAPIVersion_1_2];
+                                 withVersion:WordPressComRESTAPIVersion_2_0];
 
     ThemeServiceRemoteThemesRequestSuccessBlock successBlock = ^void (NSArray<RemoteTheme *> *themes, BOOL hasMore, NSInteger totalThemeCount) {
         NSCAssert([themes count] == expectedThemes, @"Expected %ld themes to be returned", expectedThemes);