Bump pyyaml from 3.12 to 5.4

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 3.12 to 5.4.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@3.12...5.4)

Signed-off-by: dependabot[bot] <support@github.com>

setup.py

@@ -24,7 +24,7 @@
 
 requirements = [
     'click==6.7',
-    'PyYAML==3.12',
+    'PyYAML==5.4',
     'tabulate==0.8.2',
     'tinydb==3.9.0',
     'rstr==2.2.6',