include 17.1 in travis config, only use latest releases of older versions
diff --git a/.travis.yml b/.travis.yml
index 7cd1981..d9c6fd8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,11 +2,7 @@
 notifications:
   email: false
 otp_release:
+  - 17.1
   - 17.0
   - R16B03-1
-  - R16B03
-  - R16B02
-  - R16B01
-  - R16B
   - R15B03
-  - R15B02