HOC should extends PureComponent

[Saket23]

We faced a performance issue recently while using react-sortable-hoc. If we have a large list, such as 300 to 400, and whenever its parent re-renders all the child also re renders.

So raising the PR to change it to PureComponent to get the performance benefit. Though I am a bit worried about folks who are already using it and have not taken care of the cons of using PureComponent.

[codesandbox-ci[bot]]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 46c5b16508cfd61fbe4b0fa49a1e8f8301ba0763:

Sandbox	Source
react-sortable-hoc-starter	Configuration