cups-filters 1.21.1 released!

[Till Kamppeter]

Hi,

I have released cups-filters 1.21.1 now, with the following changes:
        - foomatic-rip: Fixed segmentation fault caused by wrong
          Coverity Scan issue fix (Issue #57, Debian bug #907026).
        - Build system: Require QPDF 8.1.0 or later as it is needed by
          bannertopdf (Issue #56).

Bug fix release, especially to fix the crash bug on foomatic-rip, Debian 
bug #907026.

Please release this on Debian so that it syncs into Ubuntu.

Thanks in advance.

   Till