Travis.ci linux & macOS in one job

.travis.yml

@@ -1,20 +1,13 @@
-matrix:
+os:
-  include:
+  - linux
-    - name: "Xcode 11"
+  - osx
-      os: osx
+language: generic
-      osx_image: xcode11
+sudo: required
-      language: swift
+dist: trusty
-    
+osx_image: xcode11
-    - name: "Linux Swift 5.0"
+install:
-      os: linux
+  - eval "$(curl -sL https://swiftenv.fuller.li/install.sh)"
-      dist: trusty
-      sudo: required
-      language: swift
-      env: 
-        - SWIFT_VERSION=5.0
-      install:
-        - eval "$(curl -sL https://swiftenv.fuller.li/install.sh)"
-
 script:
   - swift package reset
+  - swift build
   - swift test