Convert shim to Typescript (#32)

ext/src/shim/state.ts

@@ -0,0 +1,22 @@
+"use strict";
+
+import ApiConfig from "./cast/classes/ApiConfig";
+import Receiver from "./cast/classes/Receiver";
+import Session from "./cast/classes/Session";
+
+export interface State {
+    apiConfig: ApiConfig;
+    receiverList: Receiver[];
+    sessionList: Session[];
+    sessionRequestInProgress: boolean;
+}
+
+// Global API state
+const state: State = {
+    apiConfig: null
+  , receiverList: []
+  , sessionList: []
+  , sessionRequestInProgress: false
+};
+
+export default state;