fix permissions in travis

Author: sjkelly

.travis.yml

@@ -8,7 +8,7 @@ julia:
   - nightly
 notifications:
   email: false
-sudo: true
+sudo: false
 script:
     - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
     - julia -e 'Pkg.clone(pwd())'