Use a shared .children array for all VNodes with 0 children. Fixes simple shallow equality-based `shouldComponentUpdate` for leaf nodes.
Use a shared .children array for all VNodes with 0 children. Fixes simple shallow equality-based `shouldComponentUpdate` for leaf nodes.

neeharv/preact,developit/preact,developit/preact,gogoyqj/preact,neeharv/preact