pyproject.toml: Update dependency versions

pyproject.toml:
Update python-dotenv, python-gitlab and orjson to their respective
current version.

pyproject.toml

@@ -32,12 +32,12 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.9"
 pydantic = "^1.8.2"
-python-dotenv = "^0.17.1"
+python-dotenv = "^0.19.0"
 pyxdg = "^0.27"
 email-validator = "^1.1.3"
 torrentool = "^1.1.1"
-python-gitlab = "^2.8.0"
-orjson = "^3.6.0"
+python-gitlab = "^2.10.0"
+orjson = "^3.6.1"
 prometheus-client = "^0.11.0"
 toml = "^0.10.2"