Force `bevy_math/curve` feature through `bevy_color` #310

Job	Run time
Coverage	10m 38s
build (stable, windows-latest)	15m 1s
build (stable, ubuntu-latest)	7m 55s
build (stable, macos-latest)	7m 58s
build (nightly, windows-latest)	15m 47s
build (nightly, ubuntu-latest)	11m 14s
build (nightly, macos-latest)	8m 5s
	1h 16m 38s

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