* Update d3-format to v1.2
* [Feature] Adds support for optional "percent" suffix in locale definition.
* Added tslint.json file
* [d3-array] Update to version 1.2
* [Feature]: Add `tickIncrement(...)`
* [Fix]: Fix incorrect return type of tickStep(...). The correct return type is `number` instead of `number[]`
* [Chore]: Updated related comments
* [d3] Update minor version to 4.8
* Fix d3-format related linting errors.