Strict node/npm engine checking fails due to poorly defined version ranges

[bjconlan]

The animate package has the following poorly defined engine constraints:

	"engines": {
		"node": ">=0.12.0",
		"npm": "^3.0.0"
	},

This needs to be updated/removed (specifically the "^3.0.0" npm range constraint) as it will fail any strict engine check in the last few years.