Drop support for EOL Python 3.3

[hugovk]

Python 3.3 was dropped in dependency python-json-pointer in stefankoegl/python-json-pointer#28.

---

PS The intro text needs updating to something like "Applying JSON Patches in Python 2.7 and 3.4+", or just "Applying JSON Patches in Python".

[stefankoegl]

Thanks!

[stefankoegl]

I've updated the intro text as suggested

[ilovezfs]

@stefankoegl I think a new release of json-patch with this PR included is needed on PyPI. On Homebrew CI for ansible, we're seeing

==> /usr/local/Cellar/ansible/2.4.3.0_4/libexec/bin/pip install -v --no-deps --no-binary :all: --ignore-installed /private/tmp/ansible--jsonpatch-20180317-6776-bt14xu/jsonpatch-1.21
Processing /private/tmp/ansible--jsonpatch-20180317-6776-bt14xu/jsonpatch-1.21
  Running setup.py (path:/private/tmp/pip-soBG6C-build/setup.py) egg_info for package from file:///private/tmp/ansible--jsonpatch-20180317-6776-bt14xu/jsonpatch-1.21
    Running command python setup.py egg_info
    warning: pypandoc module not found, could not convert Markdown to RST
    running egg_info
    creating pip-egg-info/jsonpatch.egg-info
    writing requirements to pip-egg-info/jsonpatch.egg-info/requires.txt
    writing pip-egg-info/jsonpatch.egg-info/PKG-INFO
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/tmp/pip-soBG6C-build/setup.py", line 84, in <module>
        **OPTIONS
      File "/usr/local/Cellar/ansible/2.4.3.0_4/libexec/lib/python2.7/site-packages/setuptools/__init__.py", line 129, in setup
        return distutils.core.setup(**attrs)
      File "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 151, in setup
        dist.run_commands()
      File "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 953, in run_commands
        self.run_command(cmd)
      File "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 972, in run_command
        cmd_obj.run()
      File "/usr/local/Cellar/ansible/2.4.3.0_4/libexec/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 271, in run
        writer(self, ep.name, os.path.join(self.egg_info, ep.name))
      File "/usr/local/Cellar/ansible/2.4.3.0_4/libexec/lib/python2.7/site-packages/setuptools/command/egg_info.py", line 604, in write_pkg_info
        metadata.write_pkg_info(cmd.egg_info)
      File "/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/dist.py", line 1106, in write_pkg_info
        self.write_pkg_file(pkg_info)
      File "/usr/local/Cellar/ansible/2.4.3.0_4/libexec/lib/python2.7/site-packages/setuptools/dist.py", line 76, in write_pkg_file
        file.write('%s: %s\n' % (field, attr_val))
    UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 16: ordinal not in range(128)

[stefankoegl]

I have just pushed tag 1.22 - it should be released to PyPI within minutes.

[ilovezfs]

Awesome! Thank you :)