Update to Swift 4.1 (#68)

.swift-version

@@ -1 +1 @@
-4.0.3
+4.1

.travis.yml

@@ -1,29 +1,26 @@
-# Travis CI build file for Kitura sample app.
-# Kitura runs on OS X and Linux (Ubuntu).
-# See the following URLs for further details on Travis CI
-# https://docs.travis-ci.com/user/customizing-the-build/
-# https://docs.travis-ci.com/user/docker/
-# https://docs.travis-ci.com/user/multi-os/
-
 # whitelist (branches that should be built)
 branches:
   only:
     - master
     - develop
     - /^issue.*$/
 
-notifications:
-  slack:
-    secure: "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"
-
 matrix:
   include:
     - os: linux
       dist: trusty
       sudo: required
+    - os: linux
+      dist: trusty
+      sudo: required
+      env: SWIFT_SNAPSHOT=4.0.3
+    - os: osx
+      osx_image: xcode9.3
+      sudo: required
     - os: osx
       osx_image: xcode9.2
       sudo: required
+      env: SWIFT_SNAPSHOT=4.0.3
 
 before_install:
   - git clone https://github.com/IBM-Swift/Package-Builder.git

Sources/CloudFoundryEnv/AppEnv.swift

@@ -297,7 +297,11 @@ extension ConfigurationManager {
       return service
     }
     print("results: \(results)")
+    #if swift(>=4.1)
+    return results.compactMap { $0 }
+    #else
     return results.flatMap { $0 }
+    #endif
   }
 
 }