update httpretty

[caleb15]

See #20

This should make mocurly python 3.7 compatible.

Note that this passes unit tests on our side but I haven't ran the unit tests for this project yet. Hopefully the CI will do that for me?

[caleb15]

It doesn't look like there's any CI to automatically run unit tests, darn. Guess I'll do it manually.

[caleb15]

Some unit test errors due to new httpretty w/ python 3.6 (probably 3.7 too) unfortunately:

======================================================================
ERROR: test_timeout_successful_post (tests.test_core.TestCore)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/caleb/Documents/misc/mocurly/tests/test_core.py", line 129, in test_timeout_successful_post
    self.assertRaises(ssl.SSLError, new_transaction.save)
  File "/usr/lib/python3.6/unittest/case.py", line 733, in assertRaises
    return context.handle('assertRaises', args, kwargs)
  File "/usr/lib/python3.6/unittest/case.py", line 178, in handle
    callable_obj(*args, **kwargs)
  File "/home/caleb/.local/lib/python3.6/site-packages/recurly/resource.py", line 650, in save
    return self._create()
  File "/home/caleb/.local/lib/python3.6/site-packages/recurly/resource.py", line 657, in _create
    return self.post(url)
  File "/home/caleb/.local/lib/python3.6/site-packages/recurly/resource.py", line 673, in post
    response = self.http_request(url, 'POST', body or self, {'Content-Type': 'application/xml; charset=utf-8'})
  File "/home/caleb/.local/lib/python3.6/site-packages/recurly/resource.py", line 293, in http_request
    resp = connection.getresponse()
  File "/usr/lib/python3.6/http/client.py", line 1356, in getresponse
    response.begin()
  File "/usr/lib/python3.6/http/client.py", line 307, in begin
    version, status, reason = self._read_status()
  File "/usr/lib/python3.6/http/client.py", line 276, in _read_status
    raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response