Add compat data for CSS `align-items` property (#3271)
Add compat data for CSS `align-items` property (#3271)

IE and Edge do not support any of the newer values.

Firefox, Chrome, and Safari _do_ support `start` and `end` values in grid layouts.
chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data