Add production dependencies

node_modules/rxjs/internal/util/ObjectUnsubscribedError.d.ts

@@ -0,0 +1,15 @@
+export interface ObjectUnsubscribedError extends Error {
+}
+export interface ObjectUnsubscribedErrorCtor {
+    new (): ObjectUnsubscribedError;
+}
+/**
+ * An error thrown when an action is invalid because the object has been
+ * unsubscribed.
+ *
+ * @see {@link Subject}
+ * @see {@link BehaviorSubject}
+ *
+ * @class ObjectUnsubscribedError
+ */
+export declare const ObjectUnsubscribedError: ObjectUnsubscribedErrorCtor;