[enhancement] new keyframe classes

[chrisgervang]

Adding support for many new keyframe types.

Added

• set method added to Keyframes class so that animations updates do not need to be reregistered to a Timeline.
• DeckLayerKeyframes, useful for animating any deck.gl layer. Specify layer props as keyframe keys (such as getRadius).
• KeplerFilterKeyframes, supports all filter types in kepler.gl and will autogenerate keyframes for all timeRange filter types.
• KeplerLayerKeyframes, useful for animating any kepler.gl layer vis config.
• KeplerTripKeyframes, autogenerates keyframes given an animationConfig.

Removed

• LayerKeyframes, use DeckLayerKeyframes
• GridLayerKeyframes, use DeckLayerKeyframes
• ScatterPlotLayerKeyframes, use DeckLayerKeyframes
• FilterValueKeyframes, use KeplerFilterKeyframes instead.

Todo

• docs
• tests

[coveralls]

Pull Request Test Coverage Report for Build 980259513

• 11 of 71 (15.49%) changed or added relevant lines in 6 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-2.6%) to 19.382%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
modules/core/src/keyframes/deck-layer-keyframes.js	0	3	0.0%
modules/core/src/keyframes/kepler-layer-keyframes.js	0	5	0.0%
modules/core/src/keyframes/kepler-trip-keyframes.js	0	8	0.0%
modules/core/src/keyframes/kepler-filter-keyframes.js	0	44	0.0%

Files with Coverage Reduction	New Missed Lines	%
modules/core/src/keyframes/keyframes.js	1	60.0%

Totals
Change from base Build 980187630:	-2.6%
Covered Lines:	142
Relevant Lines:	594

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💛 - Coveralls