subversion: updated to 1.13.0

Version 1.13.0

User-visible changes:
- Minor new features and improvements:
  * New 'svnadmin rev-size' command to report revision size
  * In 'svn help', hide experimental commands and global options
  * Add a hint about mod_dav_svn misconfiguration
  * Performance improvement for 'svn st' etc., in WC SQLite DB

- Client-side bugfixes:
  * Windows: avoid delays in SSL certificate validation override
  * Fix 'svn patch' setting mode 0600 on patched files with props
  * Fix "svn diff --changelist ARG" broken in subdirectories
  * Fix misleading 'redirect cycle' error on a non-repository URL

- Server-side bugfixes:
  * svnserve: Report some errors that we previously ignored
  * Make server code more resilient to malformed paths and URLs
  * Make dump stream parser more resilient to malformed dump stream
  * mod_dav_svn: Fix missing Last-Modified header on 'external' GET requests

- Client-side and server-side bugfixes:
  * Fix excessive memory usage in some cases reading binary data
  * Win32: fix svn_io_file_rename2() spinning in a retry loop

- Other tool improvements and bugfixes:
  * svn_load_dirs.pl: do not show password; fix cleanup

Developer-visible changes:
  * New svn_fs_ioctl() API for FSFS stats, dump/load index, rev-size

Version 1.12.2

User-visible changes:
  * Fix conflict resolver bug: local and incoming edits swapped.
  * Fix memory lifetime problem in a libsvn_wc error code path.
  * Faster Windows file existence checks, improving 'svn st' etc.

Developer-visible changes:
  * Allow generating Visual Studio 2019 projects
  * Fix build with APR 1.7.0.
  * Fix building Subversion with Visual Studio 2005 and 2008.
  * Allow svnserve's 'get-deleted-rev' API to return 'not deleted'.

Version 1.12.1
(Not released; see changes for 1.12.2.)

(adam)