Update .travis.yml

Author: sindresorhus

.travis.yml

@@ -1,10 +1,13 @@
+sudo: false
 language: node_js
 node_js:
+  - "iojs"
+  - "0.13"
+  - "0.12"
   - "0.10"
-  - "0.11"
 matrix:
   allow_failures:
-    - node_js: "0.10"
+    - node_js: "0.13"
   fast_finish: true
 script: "npm run-script test-travis"
-after_script: "npm install coveralls && cat ./coverage/lcov.info | coveralls"
+after_script: "npm install coveralls && cat ./coverage/lcov.info | coveralls"