Query::Builder#first and last break pagination parameters

[gaorlov]

Example:

scope = Example::User.where( name: "Greg" )
scope.first

# scope is set to
#<JsonApiClient::Query::Builder:0x000055dafec45c50 @klass=Example::Client::User, @primary_key=nil, @pagination_params={"page"=>1, "per_page"=>1}, @path_params={}, @additional_params={}, @filters={:name=>"Greg"}, @includes=[], @orders=[], @fields=[], @to_a=[#<Example::Client::User:@attributes={"type"=>"users", "id"=>1, "name"=>"Greg"}>]>

scope.all
# will call find on whatever is already there and only return the first record

scope.paginate( page: 10, :per_page: 100).first
# will eat all the pagination params and return only the first record

[gaorlov]

This can be assigned to me and I'll propose a fix in the next few weeks.