Set BUFFER as default connection type for vanilla tile entities

This was changed to INSERT in eb7c87b in an attempt to improve performance for setups where users accidentally left default settings. This should no longer be necessary since 52a6149 .
Using BUFFER as default connection type is also more user-friendly, as the side-configuration of vanilla tile entities can only be changed via cable connections or wrench, preventing simple setups like chest on top of custom block for input from working.

nova/src/main/kotlin/xyz/xenondevs/nova/world/block/tileentity/network/type/item/holder/VanillaItemHolder.kt

@@ -7,21 +7,21 @@ import xyz.xenondevs.commons.collections.enumMap
 import xyz.xenondevs.commons.collections.enumSet
 import xyz.xenondevs.commons.provider.Provider
 import xyz.xenondevs.commons.provider.mutable.defaultsToLazily
+import xyz.xenondevs.nova.util.CUBE_FACES
 import xyz.xenondevs.nova.world.block.tileentity.network.type.NetworkConnectionType
 import xyz.xenondevs.nova.world.block.tileentity.network.type.item.ItemFilter
 import xyz.xenondevs.nova.world.block.tileentity.network.type.item.holder.DefaultItemHolder.Companion.DEFAULT_CHANNELS
 import xyz.xenondevs.nova.world.block.tileentity.network.type.item.inventory.NetworkedInventory
-import xyz.xenondevs.nova.util.CUBE_FACES
 
 internal abstract class VanillaItemHolder(
     compound: Provider<Compound>
 ) : ItemHolder {
 
     override val mergedInventory: NetworkedInventory? = null
 
-    override val connectionConfig: MutableMap<BlockFace, NetworkConnectionType> by
-    compound.entry<MutableMap<BlockFace, NetworkConnectionType>>("connectionConfig")
-        .defaultsToLazily { CUBE_FACES.associateWithTo(enumMap()) { NetworkConnectionType.INSERT } }
+    override val connectionConfig: MutableMap<BlockFace, NetworkConnectionType>
+        by compound.entry<MutableMap<BlockFace, NetworkConnectionType>>("connectionConfig")
+            .defaultsToLazily { CUBE_FACES.associateWithTo(enumMap()) { NetworkConnectionType.BUFFER } }
 
     override val allowedFaces: Set<BlockFace>
         get() = connectionConfig.mapNotNullTo(enumSet()) { (face, type) ->