Fix Star Wars example

[tobias-tengler]

Closes #3480

[tobias-tengler]

I think it would be great to also get rid of the 'ExtendObjectTypeAttribute.Name.set' is obsolete warnings, but I couldn't find how I would do this properly. Maybe one of the maintainers can chime in! ;)

I'm also not sure, if the template is being released as part of the CD process, so maybe it needs to be published manually...

[michaelstaib]

[ExtendObjectType("Foo")] instead of [ExtendObjectType(Name = "Foo")] will remove the obsolete messages.

[tobias-tengler]

Removed all the obsolete warnings! :)
I also took the liberty to change the obsolete message of the SchemaType on UsePagingAttribute. "Use Type." was misleading, since the setter of Type is private, so it can't be used as a replacement and the constructor should be used instead.

[michaelstaib]

@tobias-tengler I updated the build and replaced the attribute for friends with the new extension API. Also I am now using the operation constants on the attributes and simplified the startup.

[michaelstaib]

.AddQueryType()
                        .AddTypeExtension<CharacterQueries>()
                        .AddTypeExtension<ReviewQueries>()
                    .AddMutationType()
                        .AddTypeExtension<ReviewMutations>()
                    .AddSubscriptionType()
                        .AddTypeExtension<ReviewSubscriptions>()

[michaelstaib]

If you are happy with the PR I can merge it.

[tobias-tengler]

Looks good to me! :)