build(deps): bump pyyaml from 5.3.1 to 5.4

Bumps [pyyaml](https://github.com/yaml/pyyaml) from 5.3.1 to 5.4.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/master/CHANGES)
- [Commits](yaml/pyyaml@5.3.1...5.4)

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

requirements.txt

@@ -8,7 +8,7 @@ pyudev==0.22.0
 requests==2.24.0
 xmodem==0.4.5
 autobahn==21.2.1
-PyYAML==5.3.1
+PyYAML==5.4
 ansicolors==1.1.8
 pyusb==1.1.0
 six>=1.13.0