Animate Css Grid Versions Save

• The library now uses Parcel, which simplifies the setup and produces an es module build
• Dependencies were upgraded
• Some light code and typing cleanup
• Added some updates to the readme comparing the library with CSS animations

• Bugfix to address #25
• Upgrade some dependencies

Fix issue #20 (repeated calls to unwrapGrid)

Closes #10

Satisfies #8

Another small release:

• Improve Typescript and TsLint settings
• Better handling for throttledResizeListener when grid is removed from the page

The initial way I set up Typescript, using Babel 7's integration, was not generating typings files due to the noEmit option. I updated the tsconfig.json to create the typings file.

• Converted code from JavaScript to TypeScript
• Upgraded Popmotion version and removed stylefire Popmotion dependency
• By removing stylefire and using tree-shaking more wisely, reduced the size of the library by a bit
• Added a few more examples to the Readme