fix(core): update

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@designestate/dees-element',
-  version: '2.0.19',
+  version: '2.0.20',
   description: 'a custom element class extending lit element class'
 }

ts/dees-element.classes.dees-element.ts

@@ -11,6 +11,7 @@ export class DeesElement extends plugins.lit.LitElement {
   @plugins.lit.property()
   domtools?: plugins.domtools.DomTools;
 
+  public rxSubscriptions: plugins.smartrx.rxjs.Subscription[] = [];
   private themeSubscription: plugins.smartrx.rxjs.Subscription;
 
   private elementDomReadyDeferred = plugins.domtools.plugins.smartpromise.defer();
@@ -30,6 +31,7 @@ export class DeesElement extends plugins.lit.LitElement {
     this.themeSubscription = domtools.themeManager.themeObservable.subscribe((goBrightArg) => {
       this.goBright = goBrightArg;
     });
+    this.rxSubscriptions.push(this.themeSubscription);
     this.dispatchEvent(new CustomEvent('deesElementConnected'));
   }
 
@@ -41,7 +43,9 @@ export class DeesElement extends plugins.lit.LitElement {
   public async disconnectedCallback() {
     await this.domtoolsPromise;
     super.disconnectedCallback();
-    this.themeSubscription.unsubscribe();
+    for (const subscription of this.rxSubscriptions) {
+      subscription.unsubscribe();
+    }
     this.dispatchEvent(new CustomEvent('deesElementDisconnected'));
   }
 }