Update version

ChangeLog.rst

-4.1.0 - TBD
------------
+4.1.0 - 2017-12-20
+------------------
 
 * Added ``fmt::to_wstring()`` in addition to ``fmt::to_string()`` (`#559 <https://github.com/fmtlib/fmt/pull/559>`_). Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
 

doc/build.py

@@ -6,7 +6,7 @@ import errno, os, shutil, sys, tempfile
 from subprocess import check_call, check_output, CalledProcessError, Popen, PIPE
 from distutils.version import LooseVersion
 
-versions = ['1.0.0', '1.1.0', '2.0.0', '3.0.2', '4.0.0']
+versions = ['1.0.0', '1.1.0', '2.0.0', '3.0.2', '4.0.0', '4.1.0']
 
 def pip_install(package, commit=None, **kwargs):
   "Install package using pip."