Raise version

pyproject.toml

 [tool.poetry]
 name = "AlekSIS-App-Chronos"
-version = "2.0a2"
+version = "2.0a3.dev0"
 packages = [
     { include = "aleksis" }
 ]
@@ -27,7 +27,7 @@ classifiers = [
 [tool.poetry.dependencies]
 python = "^3.7"
 calendarweek = "^0.4.4"
-AlekSIS = "^2.0a2"
+AlekSIS = "^2.0a3.dev0"
 
 [build-system]
 requires = ["poetry>=1.0"]