fix gitignore again

electron/node_modules/rxjs/dist/esm5/internal/observable/using.js

@@ -0,0 +1,17 @@
+import { Observable } from '../Observable';
+import { innerFrom } from './innerFrom';
+import { EMPTY } from './empty';
+export function using(resourceFactory, observableFactory) {
+    return new Observable(function (subscriber) {
+        var resource = resourceFactory();
+        var result = observableFactory(resource);
+        var source = result ? innerFrom(result) : EMPTY;
+        source.subscribe(subscriber);
+        return function () {
+            if (resource) {
+                resource.unsubscribe();
+            }
+        };
+    });
+}
+//# sourceMappingURL=using.js.map