Run linting manually in CI

The Atom build-package.sh script only checks `devDependencies` for
linters to run, as ESLint is only listed in our direct `dependencies`
now we need to trigger linting manually.

Includes:
* Minor update to the addon APT packages for Travis CI.
* Structure of the Circle CI script is updated to match that of atom/ci.
* Installing Noide.js on AppVeyor to run ESLint.

.travis.yml

@@ -8,6 +8,11 @@ env:
     - ATOM_CHANNEL=stable
     - ATOM_CHANNEL=beta
 
+after_script:
+  # The Atom CI script doesn't support having ESLint as a direct dependency,
+  # as such it doesn't run linting automatically for us.
+  - npm run lint
+
 ### Generic setup follows ###
 script:
   - curl -s -O https://raw.githubusercontent.com/atom/ci/master/build-package.sh
@@ -32,10 +37,8 @@ sudo: false
 
 addons:
   apt:
-    sources:
-    - ubuntu-toolchain-r-test
     packages:
-    - g++-6
+    - build-essential
     - fakeroot
     - git
     - libsecret-1-dev

appveyor.yml

@@ -4,6 +4,12 @@ environment:
   - ATOM_CHANNEL: stable
   - ATOM_CHANNEL: beta
 
+after_build:
+  # The Atom CI script doesn't support having ESLint as a direct dependency,
+  # as such it doesn't run linting automatically for us.
+  - cinst nodejs
+  - npm run lint
+
 ### Generic setup follows ###
 build_script:
   - ps: iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/atom/ci/master/build-package.ps1'))

circle.yml

@@ -1,7 +1,11 @@
-test:
+dependencies:
   override:
-    - curl -s https://raw.githubusercontent.com/Arcanemagus/ci/atomlinter/build-package.sh | sh
+    - curl -s -O https://raw.githubusercontent.com/atom/ci/master/build-package.sh
+    - chmod u+x build-package.sh
 
-dependencies:
+test:
   override:
-    - echo "Managed in the script"
+    - ./build-package.sh
+    # The Atom CI script doesn't support having ESLint as a direct dependency,
+    # as such it doesn't run linting automatically for us.
+    - npm run lint