Fix typo in bound2 test which was breaking under LuaJIT

spec/bound2_spec.lua

@@ -38,7 +38,7 @@ describe("bound2:", function()
 	it("clones a bound2", function()
 		local a = bound2(vec2(1,2), vec2(4,5))
 		local b = a:clone()
-		a.max = new vec2(9,9)
+		a.max = vec2.new(9,9)
 		assert.is.equal(a.min, b.min)
 		assert.is.not_equal(a.max, b.max)
 	end)