Thanks for contributing to react-virtualized!

Here is a short checklist of additional things to keep in mind before submitting:
* Please make sure your pull request description makes it vaery clear what you're trying to accomplish. If it's a bug fix, please also provide a failing test case (if possible). In either case, please add additional unit test coverage for your changes. :)
* Run tests locally (`npm test`) to ensure that your change did not break linting of functionality.
* Be sure you have notifications setup so that you'll see my code review responses. (I may ask you to make some adjustments before merging.)

Thanks for contributing to react-virtualized!

Here is a short checklist of additional things to keep in mind before submitting:
* Please make sure your pull request description makes it very clear what you're trying to accomplish. If it's a bug fix, please also provide a failing test case (if possible). In either case, please add additional unit test coverage for your changes. :)
* Run tests locally (`npm test`) to ensure that your change did not break linting of functionality.
* Be sure you have notifications setup so that you'll see my code review responses. (I may ask you to make some adjustments before merging.)

Fix typo in pull request template
Fix typo in pull request template
