Handle request timeout. Catch errors while parsing JSON

src/telegramPolling.js

@@ -65,11 +65,19 @@ TelegramBotPolling.prototype._getUpdates = function () {
     })
   };
   debug('polling with options: %j', opts);
-  return requestPromise(opts).cancellable().then(function (resp) {
+  return requestPromise(opts)
+    .cancellable()
+    .timeout((10 + this.timeout) * 1000)
+    .then(function (resp) {
       if (resp[0].statusCode !== 200) {
         throw new Error(resp[0].statusCode+' '+resp[0].body);
       }
-    var data = JSON.parse(resp[0].body);
+      var data;
+      try {
+        data = JSON.parse(resp[0].body);
+      } catch (err) {
+        throw new Error('Error parsing Telegram response: %s', resp[0].body);
+      }
       if (data.ok) {
         return data.result;
       } else {