Adding close function to Logging to free resources

src/base.ts

@@ -39,7 +39,7 @@ export class LoggingBase {
 
     private messageObservable = new Observable<Message>();
     protected _name: string;
-    
+
     get name() {
         return this._name;
     }
@@ -88,6 +88,10 @@ export class LoggingBase {
         }
     }
 
+    public close() {
+        this.adapter.forEach(adapter => adapter.close ? adapter.close() : undefined);
+    }
+
     public waitForSetup() {
         return Promise.all(this.adapter_init);
     }

src/types.ts

@@ -114,4 +114,7 @@ export interface Adapter {
 
     flush(sync: true): void;
     flush(sync: false): void | Promise<void>;
+
+
+    close?(): void;
 }