fix(html): remove sanitize-html-react, reduce package size

Remove sanitize html, to reduce our package size. Document
the need for sanitization in the readme.

Fixes ReactTooltip#429

README.md

@@ -64,7 +64,7 @@ Global|Specific	|Type	|Values  |  Description
  offset	|   data-offset  |  Object  |  top, right, bottom, left | `data-offset="{'top': 10, 'left': 10}"` for specific and `offset={{top: 10, left: 10}}` for global
 multiline	|   data-multiline  |  Bool  |  true, false | support `<br>`, `<br />` to make multiline
 className	|   data-class  |  String  |   | extra custom class, can use !important to overwrite react-tooltip's default class
- html	|   data-html  |  Bool  |  true, false  |  `<p data-tip="<p>HTML tooltip</p>" data-html={true}></p>` or `<ReactTooltip html={true} />`
+ html	|   data-html  |  Bool  |  true, false  |  `<p data-tip="<p>HTML tooltip</p>" data-html={true}></p>` or `<ReactTooltip html={true} />`, but see [Security Note](#security-note) below.
  delayHide	|   data-delay-hide  |  Number  |   | `<p data-tip="tooltip" data-delay-hide='1000'></p>` or `<ReactTooltip delayHide={1000} />`
  delayShow	|   data-delay-show  |  Number  |   | `<p data-tip="tooltip" data-delay-show='1000'></p>` or `<ReactTooltip delayShow={1000} />`
  delayUpdate	|   data-delay-update |  Number  |   | `<p data-tip="tooltip" data-delay-update='1000'></p>` or `<ReactTooltip delayUpdate={1000} />` Sets a delay in calling getContent if the tooltip is already shown and you mouse over another target  
@@ -78,6 +78,10 @@ className	|   data-class  |  String  |   | extra custom class, can use !importan
  resizeHide | null | Bool | true, false | Hide the tooltip when resizing the window, default is true
  wrapper | null | String | div, span | Selecting the wrapper element of the react tooltip, default is div
 
+### Security Note
+
+The `html` option allows a tooltip to directly display raw HTML. This is a security risk if any of that content is supplied by the user. Any user-supplied content must be sanitized, using a package like [sanitize-html-react](https://www.npmjs.com/package/sanitize-html-react). We chose not to include sanitization after discovering it [increased our package size](https://github.com/wwayne/react-tooltip/issues/429) too much - we don't want to penalize people who don't use the `html` option.
+
 ## Using react component as tooltip
 Check the example [React-tooltip Test](https://react-tooltip.netlify.com/)