Add types-PyYAML for mypy

Author: nukeop

node/poetry.lock

@@ -23,6 +23,7 @@ pytest-datadir = ">=1,<2"
 pytest-httpserver = ">=1,<2"
 pytest-xdist = ">=3,<4"
 poethepoet = ">=0.34,<1"
+types-pyyaml = ">=6.0.12.2,<7"
 
 [tool.poetry.scripts]
 flatpak-node-generator = "flatpak_node_generator.main:main"