fix sanity check

Author: ffreyer

GLMakie/test/runtests.jl

@@ -42,7 +42,7 @@ GLMakie.activate!(framerate = 1.0, scalefactor = 1.0)
         f, a, p = scatter(rand(10))
         colorbuffer(f)
         @test length(p.attributes.inputs) == 42
-        @test length(p.attributes.outputs) == 82
+        @test length(p.attributes.outputs) == 87
     end
 
     @testset "Reference Tests" begin