Update Travis CI configuration

Update the Travis CI configuration to account for the changes required
to support Atom v1.18.0.

Author: Arcanemagus

.travis.yml

@@ -15,7 +15,10 @@ matrix:
       env: ATOM_CHANNEL=stable
 
 ### Generic setup follows ###
-script: 'curl -s https://raw.githubusercontent.com/atom/ci/master/build-package.sh | sh'
+script:
+  - curl -s -O https://raw.githubusercontent.com/atom/ci/master/build-package.sh
+  - chmod u+x build-package.sh
+  - ./build-package.sh
 
 notifications:
   email:
@@ -31,10 +34,12 @@ git:
 
 sudo: false
 
+dist: trusty
+
 addons:
   apt:
     packages:
     - build-essential
-    - git
-    - libgnome-keyring-dev
     - fakeroot
+    - git
+    - libsecret-1-dev