feat(overmind-angular): allow selecting all state

Author: christianalfoni

packages/node_modules/overmind-angular/src/index.ts

@@ -86,7 +86,10 @@ export class Service<App extends Overmind<any>> {
       })
     }
   }
-  select(expr: any) {
-    return this.state$.pipe(map((value) => expr(value)))
+  select<T>(expr: (state: App['state']) => T): Observable<T>
+  select(): Observable<App['state']> {
+    return this.state$.pipe(
+      map((value) => (arguments[0] ? arguments[0](value) : value))
+    )
   }
 }