Prevent duplicate bus shutdowns on container destroy; bump version

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@extollo/lib",
-  "version": "0.9.18",
+  "version": "0.9.19",
   "description": "The framework library that lifts up your code.",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",

src/support/bus/Bus.ts

@@ -234,6 +234,8 @@ export class Bus<TEvent extends Event = Event> extends Unit implements EventBus<
     }
 
     onContainerDestroy(): Awaitable<void> {
+        if ( this.isUp ) {
             this.down()
         }
+    }
 }

src/support/bus/LocalBus.ts

@@ -139,6 +139,8 @@ export class LocalBus<TEvent extends Event = Event> extends CanonicalItemClass i
     }
 
     onContainerRelease(): Awaitable<void> {
+        if ( this.isUp ) {
             this.down()
         }
+    }
 }