Build framework using Carthage on CI

Author: bcylin

.travis.yml

@@ -1,9 +1,13 @@
 language: objective-c
 osx_image: xcode8
-env:
-  matrix:
-  - VERSION=9.3
-  - VERSION=latest
+matrix:
+  include:
+    - env: BUILD=9.3
+      script: bundle exec rake ci:build[9.3]
+    - env: BUILD=latest
+      script: bundle exec rake ci:build[latest]
+    - env: BUILD=carthage
+      script: make carthage
 cache:
   bundler: true
   directories:
@@ -15,8 +19,6 @@ install:
   - make install
 before_script:
   - xcodebuild -workspace ICInputAccessory.xcworkspace -list
-script:
-  - bundle exec rake ci:build[$VERSION]
 notifications:
   email: false
   slack:

Makefile

@@ -13,3 +13,6 @@ pod-install:
 setup: brew-install
 	bundle install
 	bundle exec pod install --no-repo-update
+
+carthage:
+	set -o pipefail && carthage build --no-skip-current --verbose | xcpretty