Tune Travis to get an adequate CMake

IvanUkhov · IvanUkhov · commit d507553cdd0c · 2017-05-21T17:31:56.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,6 @@
 language: rust
+
+dist: trusty
 sudo: false
 
 os:
@@ -17,11 +19,7 @@ script:
 
 addons:
   apt:
-    sources:
-      - kubuntu-backports
-
     packages:
-      - cmake
       - gfortran
 
 notifications:
