Bump version and fix core dependency

pyproject.toml

 [tool.poetry]
 name = "AlekSIS-App-Buelleten"
-version = "2.0.dev0"
+version = "2.0.dev1"
 packages = [
     { include = "aleksis" }
 ]
@@ -30,7 +30,7 @@ secondary = true
 
 [tool.poetry.dependencies]
 python = "^3.9"
-aleksis-core = {version = ">=3.0, <3.1", allow-prereleases = true }
+aleksis-core = {version = ">=3.0, <3.2", allow-prereleases = true }
 
 [tool.poetry.dev-dependencies]
 aleksis-builddeps = {version=">=2023.1.dev0", allow-prereleases=true}