Downsize the build matrix on Travis CI

Author: bcylin

.travis.yml

@@ -2,14 +2,12 @@ language: objective-c
 osx_image: xcode8
 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
-      after_script:
-        - make documentation
+    - env: VERSION=9.3
+    - env: VERSION=latest
+      script:
+        - bundle exec rake ci:build[$VERSION]
+        - make -B carthage
+        - make -B docs
 cache:
   bundler: true
   directories:
@@ -21,6 +19,8 @@ install:
   - make install
 before_script:
   - xcodebuild -workspace ICInputAccessory.xcworkspace -list
+script:
+  - bundle exec rake ci:build[$VERSION]
 notifications:
   email: false
   slack:

Makefile

@@ -18,5 +18,5 @@ setup: brew-install
 carthage:
 	set -o pipefail && carthage build --no-skip-current --verbose | xcpretty
 
-documentation:
+docs:
 	bundle exec jazzy --config .jazzy.yml