Add exit code for bot being stooped from the wrapper

Author: weeryan17

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.cascadebot</groupId>
     <artifactId>shared</artifactId>
-    <version>1.8.1</version>
+    <version>1.8.2</version>
 
     <build>
         <sourceDirectory>src/main/java</sourceDirectory>

src/main/java/com/cascadebot/shared/ExitCodes.java

@@ -2,6 +2,7 @@
 
 public final class ExitCodes {
 
+    public static final int STOP_WRAPPER = 19;
     public static final int STOP = 20;
     public static final int UPDATE = 21;
     public static final int RESTART = 22;