add gitter web hook and hopefully fix the build for ESP31B

.travis.yml

@@ -44,9 +44,9 @@ notifications:
   email:
     on_success: change
     on_failure: change
-#  webhooks:
-#    urls:
-#      - secure: "dnSY+KA7NK+KD+Z71copmANDUsyVePrZ0iXvXxmqMEQv+lp3j2Z87G5pHn7j0WNcNZrejJqOdbElJ9Q4QESRaAYxTR7cA6ameJeEKHiFJrQtN/4abvoXb9E1CxpL8aNON/xgnqCk+fycOK3nbWWXlJBodzBm7KN64vrcHO7et+M="
-#    on_success: change  # options: [always|never|change] default: always
-#    on_failure: always  # options: [always|never|change] default: always
-#    on_start: false     # default: false
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/60e65d0c78ea0a920347
+    on_success: change  # options: [always|never|change] default: always
+    on_failure: always  # options: [always|never|change] default: always
+    on_start: false     # default: false