Add optional Serene Seasons Age policies and seasonal pages (#38)

gradle.properties

@@ -36,9 +36,11 @@ mod_name=Rivencraft
 # The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
 mod_license=LGPL-3.0-or-later
 # The mod version. Rivencraft uses the x.y.z.b policy documented in README.md.
-mod_version=0.4.8.1
+mod_version=0.4.9.2
 immersive_portals_version=6.0.7
 terrablender_version=4.1.0.8
+serene_seasons_version_id=B6nTjh4b
+glitchcore_version_id=S2TfWrZR
 # The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
 # This should match the base package used for the mod sources.
 # See https://maven.apache.org/guides/mini/guide-naming-conventions.html