setup: support Bleach 4.2 for Python 3.10 support

Changelog shows no significant API changes.

Bleach 3.2 and later are however even more unreasonably paranoid than 3.1, and the test
thus has to be updated and we stop supporting 3.1 .

kallithea/lib/markup_renderer.py

@@ -117,7 +117,7 b' class MarkupRenderer(object):'
         At last it will just do a simple html replacing new lines with <br/>
 
         >>> MarkupRenderer.render('''<img id="a" style="margin-top:-1000px;color:red" src="http://example.com/test.jpg">''', '.md')
-        '<p><img id="a" src="http://example.com/test.jpg" style="color: red;"></p>'
+        '<p><img id="a" src="http://example.com/test.jpg" style=""></p>'
         >>> MarkupRenderer.render('''<img class="c d" src="file://localhost/test.jpg">''', 'b.mkd')
         '<p><img class="c d"></p>'
         >>> MarkupRenderer.render('''<a href="foo">foo</a>''', 'c.mkdn')

setup.py

@@ -66,7 +66,7 b' requirements = ['
     "mercurial >= 5.2, < 5.9",
     "decorator >= 4.2.1, < 4.5",
     "Paste >= 2.0.3, < 3.5",
-    "bleach >= 3.0, < 3.1.4",
+    "bleach >= 3.2, < 4.2",
     "Click >= 7.0, < 8",
     "ipaddr >= 2.2.0, < 2.3",
     "paginate >= 0.5, < 0.6",