Making some fields private

src/index.ts

@@ -89,9 +89,9 @@ export default class SecureFileWrapper {
    private _jwtObservableServer: Observable<(jwt: string) => void> = new Observable();
    jwtObservable = this._jwtObservableServer.getPublicApi();
 
-   jwt: string;
+   private jwt: string;
 
-   auth_lock = new Lock();
+   private auth_lock = new Lock();
 
    constructor(private server: string) {
       if (this.server.endsWith("/")) {