Merge pull request #1 from PromiseKit/xcode10

xcode10

Author: mxcl

.travis.yml

@@ -5,8 +5,10 @@ matrix:
     - {osx_image: xcode8.3, env: 'SWFT=3.1  DST="OS=10.3.1,name=iPhone SE"'}
     - {osx_image: xcode9.2, env: 'SWFT=3.2  DST="OS=11.2,name=iPhone SE"'}
     - {osx_image: xcode9.4, env: 'SWFT=3.3  DST="OS=11.4,name=iPhone 5s"'}
+    - {osx_image: xcode10,  env: 'SWFT=3.4  DST="OS=12.0,name=iPhone SE"'}
     - {osx_image: xcode9.2, env: 'SWFT=4.0  DST="OS=11.2,name=iPhone SE"'}
     - {osx_image: xcode9.4, env: 'SWFT=4.1  DST="OS=11.4,name=iPhone 5s" TEST=1'}
+    - {osx_image: xcode10,  env: 'SWFT=4.2  DST="OS=12.0,name=iPhone SE"'}
 cache:
   directories:
   - Carthage