life cycle fix

mirai-console/src/main/kotlin/net/mamoe/mirai/console/MiraiConsole.kt

@@ -104,6 +104,7 @@ object MiraiConsole {
      */
     fun stop() {
         PluginManager.disableAllPlugins()
+        CommandManager.cancel()
         try {
             bots.forEach {
                 it.get()?.close()

mirai-console/src/main/kotlin/net/mamoe/mirai/console/command/CommandManager.kt

@@ -154,7 +154,9 @@ object CommandManager : Job by {
         } catch (e: Throwable) {//should never happen
             e.printStackTrace()
         }
-        processCommandQueue()
+        if(isActive) {
+            processCommandQueue()
+        }
     }
 }