Plugin Marketplace: Download plugin updates in background

Summary: Download updated plugins in background. This is implemented by periodical polling of Marketplace GraphQL API (interval 5 min by default). The feature is under GK flipper_plugin_auto_update, so for now it is enabled only for me.

Reviewed By: mweststrate

Differential Revision: D21863057

fbshipit-source-id: 51d8223ad4b2a928f7571ea480c10ba2efd9935d

desktop/app/src/__mocks__/console.tsx

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+/*
+ * mock-fs library has issues with calls to console.log in jest tests which are not resolved yet,
+ * so this console log can be used as a workaround in jest tests with fs-mocks:
+ *   const realConsole = global.console;
+ *   global.console = consoleMock as any;
+ *   afterAll(() => {
+ *     global.console = realConsole;
+ *   });
+ * See details: https://github.com/tschaub/mock-fs/issues/234
+ */
+
+function format(entry: any) {
+  if (typeof entry === 'object') {
+    try {
+      return JSON.stringify(entry);
+    } catch (e) {}
+  }
+
+  return entry;
+}
+
+function log(...msgs: any) {
+  process.stdout.write(msgs.map(format).join(' ') + '\n');
+}
+
+export default {
+  log,
+  warn: log,
+  error: log,
+};