Merge pull request #7 from KonstantinosAng/dependabot/pip/pyyaml-5.4

Bump pyyaml from 5.3.1 to 5.4

Author: KonstantinosAng

requirements.txt

@@ -104,7 +104,7 @@ PyTweening==1.0.3
 pytz==2020.1
 pywin32==227
 pywinpty==0.5.7
-PyYAML==5.3.1
+PyYAML==5.4
 pyzmq==19.0.1
 qtconsole==4.7.4
 QtPy==1.9.0