Add empty flowers and tall_flowers tags

Fixes #945

common/src/main/java/com/viaversion/viabackwards/protocol/v1_21_4to1_21_2/Protocol1_21_4To1_21_2.java

@@ -27,6 +27,7 @@ import com.viaversion.viabackwards.protocol.v1_21_4to1_21_2.rewriter.EntityPacke
 import com.viaversion.viabackwards.protocol.v1_21_4to1_21_2.rewriter.ParticleRewriter1_21_4;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.Particle;
+import com.viaversion.viaversion.api.minecraft.RegistryType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_4;
 import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypesProvider;
 import com.viaversion.viaversion.api.protocol.packet.provider.SimplePacketTypesProvider;
@@ -165,6 +166,13 @@ public final class Protocol1_21_4To1_21_2 extends BackwardsProtocol<ClientboundP
         });
     }
 
+    @Override
+    protected void onMappingDataLoaded() {
+        super.onMappingDataLoaded();
+        tagRewriter.addEmptyTags(RegistryType.ITEM, "minecraft:tall_flowers", "minecraft:flowers");
+        tagRewriter.addEmptyTag(RegistryType.BLOCK, "minecraft:tall_flowers");
+    }
+
     @Override
     public void init(final UserConnection user) {
         addEntityTracker(user, new EntityTrackerBase(user, EntityTypes1_21_4.PLAYER));

gradle/libs.versions.toml

@@ -16,7 +16,7 @@ checkerQual = "3.39.0"
 paper = "1.16.5-R0.1-SNAPSHOT"
 velocity = "3.1.1"
 fabricLoader = "0.11.6"
-viaProxy = "3.3.7-SNAPSHOT"
+viaProxy = "3.3.8-SNAPSHOT"
 
 [libraries]