fix not editable sign after openSign

patches/server/Add-openSign-method-to-HumanEntity.patch

@@ -16,13 +16,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    public static void openSign(Sign sign, org.bukkit.entity.HumanEntity player, Side side) { // Paper - change move open sign to HumanEntity
          Preconditions.checkArgument(sign != null, "sign == null");
          Preconditions.checkArgument(side != null, "side == null");
--        Preconditions.checkArgument(sign.isPlaced(), "Sign must be placed");
-+        // Preconditions.checkArgument(sign.isPlaced(), "Sign must be placed"); // Paper - don't require placed
-         Preconditions.checkArgument(sign.getWorld() == player.getWorld(), "Sign must be in same world as Player");
+         Preconditions.checkArgument(sign.isPlaced(), "Sign must be placed");
+@@ -0,0 +0,0 @@ public class CraftSign<T extends SignBlockEntity> extends CraftBlockEntityState<
  
          SignBlockEntity handle = ((CraftSign<?>) sign).getTileEntity();
  
 -        ((CraftPlayer) player).getHandle().openTextEdit(handle, Side.FRONT == side);
++        handle.setAllowedPlayerEditor(player.getUniqueId()); // Paper
 +        ((org.bukkit.craftbukkit.entity.CraftHumanEntity) player).getHandle().openTextEdit(handle, Side.FRONT == side); // Paper - change move open sign to HumanEntity
      }
  

patches/server/Paper-Plugins.patch

@@ -5211,7 +5211,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +public final class PluginConfigConstraints {
 +
 +    public static final Set<String> RESERVED_KEYS = Set.of("bukkit", "minecraft", "mojang", "spigot", "paper");
-+    public static final Set<String> VALID_PAPER_VERSIONS = Set.of("1.19");
++    public static final Set<String> VALID_PAPER_VERSIONS = Set.of("1.19", "1.20");
 +
 +    @Documented
 +    @Retention(RetentionPolicy.RUNTIME)

test-plugin/build.gradle.kts

@@ -10,7 +10,7 @@ tasks.processResources {
         .split(".", "-").take(2).joinToString(".")
     val props = mapOf(
         "version" to project.version,
-        "apiversion" to apiVersion,
+        "apiversion" to "\"$apiVersion\"",
     )
     inputs.properties(props)
     filesMatching("paper-plugin.yml") {