Fix analyzer task (#7)

diff --git a/.travis.yml b/.travis.yml
index aa7342b..1fae12e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,7 @@
 dart_task:
   - test: -p vm,firefox
   - dartfmt
-  - analyzer
+  - dartanalyzer
 
 # Only building master means that we don't run two builds for each pull request.
 branches: