Added 1.21 (copied from 1.21.4)

versions/1.21/gradle.properties

@@ -0,0 +1,23 @@
+# Done to increase the memory available to gradle.
+org.gradle.jvmargs=-Xmx1G
+org.gradle.parallel=true
+
+# IntelliJ IDEA is not yet fully compatible with configuration cache, see: https://github.com/FabricMC/fabric-loom/issues/1349
+org.gradle.configuration-cache=false
+
+# Fabric Properties
+# check these on https://fabricmc.net/develop
+minecraft_version=1.21
+yarn_mappings=1.21+build.9
+loader_version=0.18.4
+loom_version=1.15-SNAPSHOT
+
+# Mod Properties
+mod_version=1.0.0
+maven_group=org.saturnclient
+archives_base_name=saturn-client
+
+# Dependencies
+fabric_api_version=0.102.0+1.21
+
+player_anim = 2.0.4+1.21.1