Upgrade to latest component/dom

The component/dom 0.8.0 dependency is clashing with other components requiring latest ("*") component/dom, which causes a problem because of the recent switch from `List` to array-like in component/dom. 

I switched to latest component/dom and added a test to make sure pager still works. When component/dom with the new element access API get's version tagged, the version should be fixed again.