message: Add v16 migration notes
diff: ### BREAKING CHANGES
  -* **Table:** - TsColumn definition change|- Outer border change|- Style changes
  +* **Table:** - `TsColumn` definition change
  +* **Table:** - Outer border change
  +* **Table:** - Style changes
  +
  +#### Migration Notes
  +
  +##### `TsColumn`
  +
  +`TsColumn` definitions now require a width to be set:
  +
  +```diff
  +const columns: TsColumn[] = [
  + {
  + name: 'Column One',
  ++ width: 100,
  + },
  +];
  +```
  +
  +##### Outer border
  +
  +The table no longer defines it's own outer border. See [usage docs](https://github.com/GetTerminus/terminus-ui/blob/release/terminus-ui/table/src/table.component.md).
  +
  +##### Persistent scrollbars
  +
  +The table no longer controls the scrollbars. See [usage docs](https://github.com/GetTerminus/terminus-ui/blob/release/terminus-ui/table/src/table.component.md).
  +
  +
  ## [15.10.7](https://github.com/GetTerminus/terminus-ui/compare/v15.10.6...v15.10.7) (2020-01-27)
  