chore(travis): setup travis

Author: Chris

.travis.yml

@@ -0,0 +1,8 @@
+language: swift
+osx_image: xcode11.3
+script:
+  - swift package generate-xcodeproj
+  - xcodebuild clean test -destination 'name=iPhone 8' -scheme RemoteImage-Package -enableCodeCoverage YES -derivedDataPath .build/derivedData -quiet
+after_success:
+  # upload test coverage data
+  - bash <(curl -s https://codecov.io/bash) -J '^RemoteImage$' -D .build/derivedData