BREAKING CHANGE(decorators): Migrate to TC39 standard decorators (accessor) across components, update tsconfig and bump dependencies

ts_web/elements/dees-heading.ts

@@ -28,7 +28,7 @@ export class DeesHeading extends DeesElement {
    * Heading level: 1-6 for h1-h6, or 'hr' for horizontal rule style
    */
   @property({ type: String, reflect: true })
-  public level: '1' | '2' | '3' | '4' | '5' | '6' | 'hr' | 'hr-small' = '1';
+  accessor level: '1' | '2' | '3' | '4' | '5' | '6' | 'hr' | 'hr-small' = '1';
 
   // STATIC STYLES
   public static styles: CSSResult[] = [