Update pyproject.toml and bump version to 2.0b0

pyproject.toml

 [tool.poetry]
 name = "AlekSIS-App-Resint"
-version = "2.0a4"
+version = "2.0b0"
 packages = [
     { include = "aleksis" }
 ]
@@ -13,10 +13,15 @@ authors = [
    "Frank Poetzsch-Heffter <p-h@katharineum.de>",
    "Jonathan Weth <dev@jonathanweth.de>"
 ]
-license = "EUPL-1.2"
-repository = "https://edugit.org/AlekSIS/onboarding/AlekSIS-App-Resint"
+maintainers = [
+    "Jonathan Weth <dev@jonathanweth.de>",
+    "Dominik George <dominik.george@teckids.org>"
+]
+license = "EUPL-1.2-or-later"
+homepage = "https://aleksis.org/"
+repository = "https://edugit.org/AlekSIS/official/AlekSIS-App-Resint"
 classifiers = [
-    "Development Status :: 3 - Alpha",
+    "Development Status :: 4 - Beta",
     "Environment :: Web Environment",
     "Intended Audience :: Education",
     "Topic :: Education"