Fix this broken test

[odow]

WaterModels.jl/test/des.jl

Lines 10 to 16 in 7d57d1b

	if _is_valid_status(result["termination_status"])
	@test isapprox(result["objective"], 1.36e6, rtol=1.0e-4)
	else
	# FIXME(odow): this test is broken ubuntu and windows in Julia
	# v1.11 but not v1.6, and not on macOS.
	@test_broken isapprox(result["objective"], 1.36e6, rtol=1.0e-4)
	end