feat: Add CalendarSelector component and install new dependencies.

node_modules/rxjs/dist/esm5/internal/util/EmptyError.js

@@ -0,0 +1,9 @@
+import { createErrorClass } from './createErrorClass';
+export var EmptyError = createErrorClass(function (_super) {
+    return function EmptyErrorImpl() {
+        _super(this);
+        this.name = 'EmptyError';
+        this.message = 'no elements in sequence';
+    };
+});
+//# sourceMappingURL=EmptyError.js.map