Some tests failing with python 3.6 and 3.7

[nyanloutre]

Hello,

I noticed that tests don't pass on python 3.6 and 3.7 with the following error:

======================================================================
FAIL: test_invalid_data (qrcode.tests.test_release.UpdateManpageTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/nix/store/zls48cbfg36i19pvn1gvprxyvwyginhk-python3-3.7.1/lib/python3.7/unittest/mock.py", line 1191, in patched
    return func(*args, **keywargs)
  File "/build/qrcode-6.0/qrcode/tests/test_release.py", line 20, in test_invalid_data
    mock_file.assert_called()
  File "/nix/store/zls48cbfg36i19pvn1gvprxyvwyginhk-python3-3.7.1/lib/python3.7/unittest/mock.py", line 792, in assert_called
    raise AssertionError(msg)
AssertionError: Expected 'open' to have been called.

======================================================================
FAIL: test_no_change (qrcode.tests.test_release.UpdateManpageTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/nix/store/zls48cbfg36i19pvn1gvprxyvwyginhk-python3-3.7.1/lib/python3.7/unittest/mock.py", line 1191, in patched
    return func(*args, **keywargs)
  File "/build/qrcode-6.0/qrcode/tests/test_release.py", line 31, in test_no_change
    mock_file.assert_called()
  File "/nix/store/zls48cbfg36i19pvn1gvprxyvwyginhk-python3-3.7.1/lib/python3.7/unittest/mock.py", line 792, in assert_called
    raise AssertionError(msg)
AssertionError: Expected 'open' to have been called.

It could be related to this line:

python-qrcode/qrcode/tests/test_release.py

Line 18 in 3505606

sys.version_info[0] == 3 and sys.version_info[1] < 6,

[SmileyChris]

Fixed in 3505606, just hadn't rolled a new release. Will do that now.

[nyanloutre]

Thanks !