Don't fix Polymer version

[samuelli]

bower install on paper-datatable currently results in a resolution fail. Could the bower dependencies use ^ instead of ~ so the versions are more flexible here?

[RoXuS]

Hello @samuelli,

This repo is no longer maintained.

You can use mine (https://github.com/RoXuS/paper-datatable-api) or one of this https://www.webcomponents.org/collection/StartPolymer/awesome-table-elements.