Merge pull request #15 from forax/dependabot/pip/docker/pygments-2.7.4

Bump pygments from 2.4.2 to 2.7.4 in /docker

Author: forax

docker/requirements.txt

@@ -22,7 +22,7 @@ notebook==6.4.12
 pandocfilters==1.4.1
 prometheus-client==0.7.1
 ptyprocess==0.6.0
-Pygments==2.4.2
+Pygments==2.7.4
 pyrsistent==0.15.6
 python-dateutil==2.8.0
 pyzmq==18.0.2