Add children to Dropdown props interface (#171)

* Add children to Dropdown props interface

While attempting to import the `<Dropdown>` component from Flame in the new insights app (https://github.com/lightspeed-hospitality/lighthouse-insights), we ran into a Typescript issue where the app wouldn't compile because `children` was not a valid prop in the `Dropdown` interface.

The insights app is using React 18 and in that version React.FC no longer includes children by default.
- https://stackoverflow.com/a/71809927/16826114
- https://solverfox.dev/writing/no-implicit-children/

So any Flame components that use React.FC and a children prop will probably need to be updated to be compatible with React 18 and TS. For now we're making this one change in this one component we need as a way to kick the tires on contributing to Flame and to make sure it works as we expect.

* Update CHANGELOG.md

* Add documentation about using `yarn link`

* Update CONTRIBUTING.md

.github/CONTRIBUTING.md

@@ -72,6 +72,20 @@ yarn dev
 
 This will install/update dependencies, including `packages/` ones, and launch Storybook on [http://localhost:6006/](http://localhost:6006/).
 
+#### Link a local version of @lightspeed/flame to your project
+
+If you want to test your changes in a local project, you can link your local version of `@lightspeed/flame` using [yarn link](https://classic.yarnpkg.com/en/docs/cli/link/), e.g.
+
+```sh
+# Link the react package
+cd packages/flame/dist
+yarn link
+cd /path/to/your/project
+yarn link "@lightspeed/flame"
+```
+
+Note that in the above example you need to run `yarn link` inside the `dist` folder of a given package. If you're not seeing local changes reflected in your project, you may need to run `yarn build` inside the `packages/flame` folder and then restart your project's web server or [typescript server](https://tinytip.co/tips/vscode-restart-ts).
+
 #### Run tests
 
 ```sh

packages/flame/CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Refer to the [CONTRIBUTING guide](https://github.com/lightspeed/flame/blob/master/.github/CONTRIBUTING.md) for more info.
 
+## [Unreleased]
+
+### Added
+
+- Add children to Dropdown props interface ([#171](https://github.com/lightspeed/flame/pull/171))
+- Update CONTRIBUTING.md about using `yarn link` ([#172](https://github.com/lightspeed/flame/pull/171))
+
 ## 2.4.2 - 2022-10-12
 
 ### Added

packages/flame/src/Dropdown/Dropdown.tsx

@@ -18,6 +18,7 @@ type Placement = 'start' | 'center' | 'end' | PopperPlacement;
 
 interface Props extends Merge<PopoverContainerProps, Omit<ButtonProps, 'onClick'>> {
   buttonContent: React.ReactNode;
+  children: React.ReactNode;
   initiallyOpen?: boolean;
   placement?: Placement;
   onClick?: (toggle: () => void, event: React.MouseEvent<HTMLButtonElement, MouseEvent>) => void;