Subversion 1.13.0 up for testing/signing

[Julian Foad]

The 1.13.0 release artifacts are now available for testing/signing.
Please get the tarballs from
  https://dist.apache.org/repos/dist/dev/subversion
and add your signatures there.
*** There is no change from 1.13.0-rc1 except version number and date of 
rolling. If you wish, you may consider that checking the tarballs are 
correctly formed and have just that diff against -rc1 is sufficient to 
sign them.

Thanks!