Merge pull request #7 from dart-lang/sudo_fix

Update .travis.yml
diff --git a/.travis.yml b/.travis.yml
index 82c72d2..b1279b7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,3 @@
 language: dart
 script: ./tool/travis.sh
-
+sudo: false