travis: add libwebsockets 2.2.1

diff --git a/.travis.yml b/.travis.yml
index 09a89b1b69c7d1a51e4385b8385fe6b0a7ddd1a5..6dddcbda53fdf19195cd2fcd057704445af3b132 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ env:
   - LIBWEBSOCKETS_VERSION=v1.7.9
   - LIBWEBSOCKETS_VERSION=v2.0.3
   - LIBWEBSOCKETS_VERSION=v2.1.1
+  - LIBWEBSOCKETS_VERSION=v2.2.1
 sudo: required
 dist: trusty
 branches: