Merge pull request #578 from flaskbb/dependabot/pip/pygments-2.7.4

Bump pygments from 2.7.3 to 2.7.4

requirements.txt

@@ -40,7 +40,7 @@ mistune==0.8.4
 olefile==0.46
 Pillow==8.0.1
 pluggy==0.13.1
-Pygments==2.7.3
+Pygments==2.7.4
 python-dateutil==2.8.1
 python-editor==1.0.4
 pytz==2020.4