Update dev dependency listing to group notation.

Author: rodrigogiraoserrao

poetry.lock

@@ -44,7 +44,7 @@ nanoid = ">=2.0.0"
 [tool.poetry.extras]
 dev = ["aiohttp", "click", "msgpack"]
 
-[tool.poetry.dev-dependencies]
+[tool.poetry.group.dev.dependencies]
 pytest = "^7.1.3"
 black = "^22.3.0"
 mypy = "^0.990"
@@ -57,8 +57,6 @@ pytest-aiohttp = "^1.0.4"
 time-machine = "^2.6.0"
 Jinja2 = "<3.1.0"
 syrupy = "^3.0.0"
-
-[tool.poetry.group.dev.dependencies]
 mkdocs-rss-plugin = "^1.5.0"
 httpx = "^0.23.1"