* Create a new hook to enable data decimation
The `beforeElementUpdate` hook can be used to decimate data. The chart
elements will not be created until after this hook has fired ensuring that
if decimation occurs, only the needed elements will be created.
* Address code review feedback
* Rename hook to beforeElementsUpdate
* Simplify parsing logic
* Add decimation plugin to the core
* Allow a dataset to specify a different data key
* Decimation plugin uses the dataKey feature
* Refactor the decimation plugin to support configurable algorithms
* Lint the plugin changes
* Tests for the dataKey feature
* Convert test files to tabs
* Standardize on tabs in ts files
* Remove the dataKey feature
* Replace dataKey usage in decimation plugin
We define a new descriptor for the `data` key allowing the
plugin to be simpler.
* Disable decimation when indexAxis is Y
* Simplify the decimation width approximation
* Resolve the indexAxis correctly in all cases
* Initial documentation
* Reverse check
* Update TS definitions for new plugin options
* Move defineProperty after bailouts
* Add destroy hook
* Rename ElementOptions to ElementOptionsByType
* Rename CommonOptions to CommonElementOptions
* Rename PluginOptions to PluginOptionsByType
Add new PluginChartOptions and remove some duplicates
* Rename ScaleOptions to ScaleOptionsByType
* Use Partial where appropriate
* Create standardized text render method
* Document renderText options and enable configurable decoration width
* Add tests for font rendering
* Split color definition to it's own file
* renderText supports setting styles
* Mock context needs to track textBaseline
* renderText can set textAlign and textBaseline
* renderText does not mutate the context + translate/rotate
* Explicitly set the text decoration style
* Move useStroke logic into renderText
* Cartesian scale: Update computeLabelItems to avoid duplicate allocations
* Enable axis tick styling independent of grid lines
* Change tickMarkLength to tickLength for consistency with new options
* Add new scale options to TS definitions
* Update type definitions and docs for legends
* Fix types for onHover and onClick callbacks
core.controller.js's implementation also passes the Chart instance as `this`. However, that isn't documented, and it's my impression that Chart.js is moving away from passing items as `this`, so I didn't declare it in the type definitions.
* Allow multi-line ticks
* Stricter DeepPartial definition
The previous definition resolved to `{}` (which can allow primitives) if it was given a function, so it was far too broad for any `Scriptable<>` properties.
* Grammar and writing style
* Updates to animation docs
Document the `fn` option, since it's in the type definitions.
Fix callback usage to match example code.
* Fix AnimationEvent parameter
The onProgress and onComplete events were mistakenly declared as taking the standard DOM AnimationEvent. (Should Chart.js's AnimationEvent be renamed to ChartAnimationEvent to avoid any possible ambiguity?)
* Allow false for disabling animations
* Add comments explaining the layout and usage of Rollup
