Update werkzeug to 0.13

[pyup-bot]

There's a new version of Werkzeug available.
You are currently using 0.12.2. I have updated it to 0.13

These links might come in handy: PyPI | Changelog | Homepage

Changelog

0.13

---

Released on December 7th 2017

• Deprecate support for Python 2.6 and 3.3. CI tests will not run
  for these versions, and support will be dropped completely in the next
  version. (pallets/meta24_)
• Raise TypeError when port is not an integer. (1088_)
• Fully deprecate werkzeug.script. Use Click_ instead. (1090_)
• response.age is parsed as a timedelta. Previously, it was
  incorrectly treated as a datetime. The header value is an integer
  number of seconds, not a date string. (414_)
• Fix a bug in TypeConversionDict where errors are not propagated
  when using the converter. (1102_)
• Authorization.qop is a string instead of a set, to comply with
  RFC 2617. (984_)
• An exception is raised when an encoded cookie is larger than, by
  default, 4093 bytes. Browsers may silently ignore cookies larger than
  this. BaseResponse has a new attribute max_cookie_size and
  dump_cookie has a new argument max_size to configure this.
  (780, 1109)
• Fix a TypeError in werkzeug.contrib.lint.GuardedIterator.close.
  (1116_)
• BaseResponse.calculate_content_length now correctly works for
  Unicode responses on Python 3. It first encodes using
  iter_encoded. (705_)
• Secure cookie contrib works with string secret key on Python 3.
  (1205_)
• Shared data middleware accepts a list instead of a dict of static
  locations to preserve lookup order. (1197_)
• HTTP header values without encoding can contain single quotes.
  (1208_)
• The built-in dev server supports receiving requests with chunked
  transfer encoding. (1198_)

.. _Click: https://www.palletsprojects.com/p/click/
.. _pallets/meta24: https://github.com/pallets/meta/issues/24
.. _414: pallets/werkzeug#414
.. _705: pallets/werkzeug#705
.. _780: pallets/werkzeug#780
.. _984: pallets/werkzeug#984
.. _1088: pallets/werkzeug#1088
.. _1090: pallets/werkzeug#1090
.. _1102: pallets/werkzeug#1102
.. _1109: pallets/werkzeug#1109
.. _1116: pallets/werkzeug#1116
.. _1197: pallets/werkzeug#1197
.. _1198: pallets/werkzeug#1198
.. _1205: pallets/werkzeug#1205
.. _1208: pallets/werkzeug#1208

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖