Constructor Tests

These tests check that the various constructor signatures work.

Basic constructors

	{ "spaceId": "p3", "coords": [ 0, 1, 0 ], "alpha": 1 }
	{ "spaceId": "srgb", "coords": [ 1, 0, 0 ], "alpha": 1 }
	{ "spaceId": "hsl", "coords": [ 10, 50, 50 ], "alpha": 1 }
	{ "spaceId": "p3", "coords": [ 0, 1, 0 ], "alpha": 1 }
	{ "spaceId": "rec2100pq", "coords": [ 0.34, 0.34, 0.34 ], "alpha": 1 }