Add 1.13.1 to supported versions

Doesn't seem to add any issues

pom.xml

@@ -69,7 +69,7 @@
         <dependency>
             <groupId>org.bukkit</groupId>
             <artifactId>bukkit</artifactId>
-            <version>1.13-R0.1-SNAPSHOT</version>
+            <version>1.13.1-R0.1-SNAPSHOT</version>
             <scope>provided</scope>
         </dependency>
         <dependency>

src/main/java/de/epiceric/shopchest/ShopChest.java

@@ -164,6 +164,7 @@ public class ShopChest extends JavaPlugin {
             case "v1_11_R1":
             case "v1_12_R1":
             case "v1_13_R1":
+            case "v1_13_R2":
                 break;
             default:
                 debug("Server version not officially supported: " + Utils.getServerVersion() + "!");