Longer timeout (regression)

Author: Bill Barnes

.gitignore

@@ -3,3 +3,5 @@ built
 .vscode
 /directLine.js
 /directLine.js.map
+
+npm-debug.log

src/directLine.ts

@@ -225,7 +225,7 @@ export interface DirectLineOptions {
 
 const lifetimeRefreshToken = 30 * 60 * 1000;
 const intervalRefreshToken = lifetimeRefreshToken / 2;
-const timeout = 5 * 1000;
+const timeout = 20 * 1000;
 const retries = (lifetimeRefreshToken - intervalRefreshToken) / timeout;
 
 const errorExpiredToken = new Error("expired token");