Fix travis.yml

Author: hdgarrood

.travis.yml

@@ -9,7 +9,7 @@ install:
   - wget -O $HOME/purescript.tar.gz https://github.com/purescript/purescript/releases/download/$TAG/linux64.tar.gz
   - tar -xvf $HOME/purescript.tar.gz -C $HOME/
   - chmod a+x $HOME/purescript
-  - npm install
   - npm install -g bower
+  - npm install
 script:
   - npm run build