Scheduled weekly dependency update for week 04 (#100)

* Update bleach from 3.2.1 to 3.2.2

* Update pytest-cov from 2.11.0 to 2.11.1

* Update tox from 3.21.1 to 3.21.2

* Update virtualenv from 20.3.1 to 20.4.0

requirements.txt

@@ -3,7 +3,7 @@ appdirs==1.4.4
 atomicwrites==1.4.0
 attrs==20.3.0
 black==20.8b1
-bleach==3.2.1
+bleach==3.2.2
 bumpversion==0.6.0
 certifi==2020.12.5
 chardet==4.0.0
@@ -24,15 +24,15 @@ py==1.10.0
 pyperclip==1.8.1
 Pygments==2.7.4
 pytest==6.2.1
-pytest-cov==2.11.0
+pytest-cov==2.11.1
 readme-renderer==28.0
 requests==2.25.1
 requests-toolbelt==0.9.1
 six==1.15.0
 toml==0.10.2
-tox==3.21.1
+tox==3.21.2
 tqdm==4.56.0
 twine==3.3.0
 urllib3==1.26.2
-virtualenv==20.3.1
+virtualenv==20.4.0
 webencodings==0.5.1