Update jquery version to be less than 2.2.0

With the current range `>=1.7.0 <= 2.1.0`, `jquery@2.1.1` is unmet. But I imagine ember would be just as compatible with `2.1.0` as any `2.1.x` patch version and thus `<= 2.1.0` should be `< 2.2.0` instead.

Thanks!