chore(deps): Update PyYAML (#569)

Author: dbanty

poetry.lock

@@ -26,14 +26,14 @@ colorama = {version = "^0.4.3", markers = "sys_platform == 'win32'"}
 shellingham = "^1.3.2"
 black = "*"
 isort = "^5.0.5"
-pyyaml = "^5.3.1"
 importlib_metadata = {version = ">2,<5", python = "<3.8"}
 pydantic = "^1.6.1"
 attrs = "^21.0.0"
 python-dateutil = "^2.8.1"
 httpx = ">=0.15.4,<0.22.0"
 autoflake = "^1.4"
 typing-extensions = { version = "*", python = "<3.8" }
+PyYAML = "^6.0"
 
 [tool.poetry.scripts]
 openapi-python-client = "openapi_python_client.cli:app"
@@ -48,7 +48,7 @@ pytest-cov = "*"
 python-multipart = "*"
 flake8 = "*"
 typer-cli = "^0.0.12"
-types-PyYAML = "^5.4.3"
+types-PyYAML = "^6.0.3"
 types-certifi = "^2020.0.0"
 types-python-dateutil = "^2.0.0"
 types-dataclasses = { version = "^0.6.0", python = "<3.7" }