This update for python-Routes fixes the following issues:

- update to 2.5.1:

* Add compatibility for Python 3.7+.
  * Add graceful fallback for invalid character encoding from request object.
  * Enhanced performance for matching routes that share the same static prefix.
  * Fixed issue with child routes not passing route conditions to the Mapper.connect call. 
  * Fixed documentation to reflect default value for minimization.
  * Allow backslash to escape special characters in route paths.
  * Resolve invalid escape sequences.
  * Remove support for Python 2.6, 3.3, and 3.4.
  * Remove obsolete Python 2.3 compat code.

- update to 2.4.1:

  * Release as a universal wheel. PR #75.
  * Convert readthedocs links for their .org -> .io migration for hosted projects.

- update to 2.3.1:

  * Backwards compatability fix - connect should work with mandatory
    routename and optional path. Patch by Davanum Srinivas (PR #65).
  * Fix sub_domain equivalence check. Patch by Nikita Uvarov
  * Add support for protocol-relative URLs generation (i.e. starting with double
    slash ``//``). PR #60. Patch by Sviatoslav Sydorenko.
  * Add support for the ``middleware`` extra requirement, making possible to
    depend on ``webob`` optionally. PR #59. Patch by Sviatoslav Sydorenko.
  * Fix matching of an empty string route, which led to exception in earlier
    versions. PR #58. Patch by Sviatoslav Sydorenko.
  * Add support for the ``requirements`` option when using
    mapper.resource to create routes. PR #57. Patch by Sean Dague.
  * Concatenation fix when using submappers with path prefixes. Multiple
    submappers combined the path prefix inside the controller argument in
    non-obvious ways. The controller argument will now be properly carried
    through when using submappers. PR #28.

- update to 2.2:

  * Fix Python 3 support. Patch by Victor Stinner.

- update to 2.1:

  * Fix 3 other route matching groups in route.py to use anonymous groups for
    optional sections to avoid exceeding regex limits. Fixes #15.
  * Printing a mapper now includes the Controller/action parameters from the
    route. Fixes #11.
  * Fix regression that didn't allow passing in params 'host', 'protocol', or
    'anchor'. They can now be passed in with a trailing '_' as was possible
    before commit d1d1742903fa5ca24ef848a6ae895303f2661b2a. Fixes #7.
  * URL generation with/without SCRIPT_NAME was resulting in the URL cache
    failing to return the appropriate cached URL generation. The URL cache
    should always include the SCRIPT_NAME, even if its empty, in the cache
    to avoid this, and now does. Fixes #6.
  * Extract Route creation into separate method in Mapper.  Subclasses of Route
    can be created by Mappers now.
  * Use the first X_FORWARDED_FOR value if there are multiple proxies in the
    path. Fixes #5.
  * Python 3.2/3.3 Support. Fixes Issue #2. Thanks to Alejandro Sánchez for
    the pull request!

- Update to version 1.13:

  * Fix bug with dots forcing extension by default. The portion with the dot
    can now be recognized. Patch by Michael Basnight.