Change version to pre-release

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "django-guid"
-version = "3.1.0"  # Remember to also change __init__.py version
+version = "3.1.0-rc1"  # Remember to also change __init__.py version
 description = "Middleware that enables single request-response cycle tracing by injecting a unique ID into project logs"
 authors = ["Jonas Krüger Svensson <jonas-ks@hotmail.com>"]
 maintainers = ["Sondre Lillebø Gundersen <sondrelg@live.no>"]
@@ -61,11 +61,6 @@ celery = "^5.0.2"
 redis = "^3.5.3"
 ipython = "^7.19.0"
 
-[tool.poetry.extras]
-celery = ["celery"]
-sentry = ["sentry-sdk"]
-all = ["celery,sentry-sdk"]
-
 [tool.black]
 line-length = 120
 skip-string-normalization = true