* Added declarations for content-disposition
* Fixed missing semicolon
* Added empty function
* Made ContentDisposition an interface instead of a class
* Filename may be undefined but not void
* d3-path strictNullChecks and JSDoc
* (d3-path) [Chore] Added complete JSDoc comments
* (d3-path) [Enhancement] Validated and activated for use with `strictNullChecks`
* d3-chord: Enhancement, Fixes, Chore
* (d3-chord) [BREAKING FIX] Added additional interfaces Ribbon and RibbonSubgroup to reflect the interfaces actually assumed by default by RibbonGenerator. While the API documentation refers to passing in a Chord object when invoking the RibbonGenerator by default, this actually means the default radius accessor returns undefined, which is then coerced to NaN. To avoid this "silent" fail, Ribbon and RibbonSubgroup are now used as the datum types returned by the default `ribbon()` factory without explicit generics. This is a purposely accepted breaking change, as it means that passing in a Chord object will now fail. The correct way, will be to use the generics of the `ribbon<...>()` factory to cast the datum type to work with Chord. This should serve as a mental cue to ensure the accessors are customized accordingly. E.g. by setting a constant radius.
* (d3-chords) [Chore]: Added JSDoc comments
* (d3-chords) [Enhancement]: Validated, updated and activated for use with `strictNullChecks`. Note,in particular the updated signatures for invoking the RibbonGenerator. These are now overloaded with one returning `void` (canvas context), and the other returning `string | null`, where the rendering context is `null`. Note that teh API suggests a string is returned in this case, however, it may actually return `null` as well as per source code. It is at the developers discretion to ensure return value expectations correspond to rendering context.
* (d3-chords) [Chore] Updated tests and bumped patch version number to indicate which version was last fully reviewed.
* d3-time: strictNullChecks, JSDoc and Fix
* (d3-time) [Fix]: Return type of method `TimeInterval.filter(...)` changed from `this` to `TimeInterval`. This corrects an earlier regression, whereby applying `filter(...)` on a `CountableTimeInterval` incorrectly returns `CountableTimeInterval`. The correct return type is restricted to `TimeInterval`. Tests updated.
* (d3-time) [Enhancement]: Validated, updated and activated for use with `strictNullChecks`. Tests updated.
* (d3-time) [Chore]: Complete JSDoc comments.
* (d3-time) [Chore]: Updated patch version to reflect latest validated release of d3-time
* d3-scale:
* (d3-scale) [Refactoring]: Added interface `ScaleContinuousNumeric<Range, Output>` to consolidate some of the repeatable properties for numeric continuous scales. Use extension and scale-specific implementations as needed
* (d3-scale) [Fix]: `ScaleLogarithmic.nice()` does not have `count` argument
* (d3-scale) [Fix]: Relaxed constraint on data type for `domain(...)` setter and scale application for `ScaleTime` to allow numeric values, which are coerced to Date internally by d3-scale.
* (d3-scale) [Enhancement]: Validated, updated and acrivated for use with `strictNullChecks`
* (d3-scale) [Chore]: JSDoc comments completed
* d3-shape
* (d3-shape) [Fix]: Signatures for invoking a generator which renders have been changed as follows: There used to be one signature which returned `string | undefined` depending on whether a rendering context was or not. This had been split into two signatures, the first returns `string | null` when creating a path string with rendering context "null", the second returns `void` when a rendering context is set. The change was made, so that the configured generator can be passed into a `Selection.attr('d', ...)` call without issues. Note that the `string | null` return type for the path string option is based on the actual code, which may return `null` if path string generation "fails".
* (d3-shape) [Fix]: Added missing `padRadius` signature to `Arc` generator.
* (d3-shape) [Fix]: Removed `line<This, Datum>(): Line<Datum>` signature, as there is not "this" context for line generator
* (d3-shape) [Enhanced]: Where generators allow configurations of curve factories to be used, as second signature was added to allow casting the return type of the `curve<C extends CurveFactory | CurveFactoryLineOnly>(): C` getter
* (d3-shape) [Fix]: Fixed invocation signatures for `CurveFactoryLineOnly` and `CurveFactory`. The signature incorrectly used to allow null: `CanvasRenderingContext2D | null`. It has been changed to `CanvasRenderingContext2D | Path`, `Path` has been added as this is actually the rendering context used internally by the generators in d3-shape, when creating an SVG path string.
* (d3-shape) [Fix]: Moved `index` property from `SeriesPoint` to `Series` interface. This corresponds to actual D3 data structure/API.
* (d3-shape) [Enhancement]: Validated, updated and enhanced for use with `strictNullChecks`.
* (d3-shape) [chore] Changes related to linting, Disabled "unified-signatures" in tsling.json due to usability considerations.
* d3-chord and d3-scale:
* (d3-chord) [Fix]: Minor fixes to correct comments
* (d3-chord) [Chore]: Completed linting and added `tslint.json` to disable "unified-signatures" rule due to usability considerations.
* (d3-scale) [Chore]: Completed linting and added `tslint.json` to disable "unified-signatures" rule due to usability considerations.
* d3-shape:
* (d3-shape) [Chore]: Selectively disable linting rule for functional interfaces which are extended. (As per @gustavderdrache)
* d3-scale:
* (d3-scale) [Chore]: Selectively disable lint warning on extended functional interface
* Removed comment from `tslint.json` files.
* strictNullChecks chore
* (d3-chord) [Chore]: Use postfix to assert non-null for a test variable.
* (d3-shape) [Chore]: Use postfix to assert non-null for a test variable.
* Updated header comments to new convention.
* d3-chord
* (d3-chord) [Chore]: Change occurrence of double-quotation mark for single-quotation mark in test file
* d3 (Update to version 4.4)
* Pin dependency for d3-geo to version 1.4
* Pin dependency for d3-zoom to version 1.1
* Update header comment version to 4.4
* d3 legacy linting
* disabled linting of legacy definitions and tests at file level.
* Remove tslint:disable from legacy tests
