Update to cssutils 1.0.1

This fixes cssutils on Python 3.5 (yay!).

requirements.txt

@@ -5,4 +5,4 @@ pyPEG2==2.15.2
 PyYAML==3.11
 colorama==0.3.3
 colorlog==2.6.0
-cssutils==1.0
+cssutils==1.0.1

tests/unit/browser/test_mhtml.py

@@ -230,9 +230,7 @@ def test_empty_content_type(checker):
 
 
 @pytest.mark.parametrize('has_cssutils', [
-    # TODO: remove xfail once new cssutils is released
-    pytest.mark.xfail(sys.version_info >= (3, 5), reason='https://'
-                      'bitbucket.org/cthedot/cssutils/issues/52')(True),
+    True,
     False,
 ])
 @pytest.mark.parametrize('inline, style, expected_urls', [

tests/unit/utils/test_version.py

@@ -435,9 +435,7 @@ class TestModuleVersions:
         ('jinja2', True),
         ('pygments', True),
         ('yaml', True),
-        pytest.mark.xfail(sys.version_info >= (3, 5), reason='cssutils 1.0 and'
-                          ' earlier are broken on Python 3.5')(('cssutils',
-                                                                True)),
+        ('cssutils', True),
     ])
     def test_existing_attributes(self, name, has_version):
         """Check if all dependencies have an expected __version__ attribute.