Added project_config_manager interface

Author: yavorona

packages/optimizely-sdk/lib/core/project_config/project_config_manager.d.ts

@@ -0,0 +1,28 @@
+	/**
+ * Copyright 2020, Optimizely
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+declare module '@optimizely/optimizely-sdk/lib/core/projet_config_manager' {
+   import { ProjectConfig } from '@optimizely/optimizely-sdk/lib/core/project_config';
+   interface ProjectConfigManager {
+      getConfig(): ProjectConfig | null;
+      onUpdate(): (listener: (config: ProjectConfig) => void) => () => void;
+      onReady(): Promise<{ success: boolean; reason?: string }>;
+      getOptimizelyConfig(): ProjectConfig | null;
+      stop(): Promise<void> | void;
+   }
+
+   export function ProjectConfigManager(config: ProjectConfig): ProjectConfigManager;
+}