Support Swift 5 (#41)

* Support Swift 5, drop Swift 3

Author: djones6

.travis.yml

@@ -11,10 +11,6 @@ branches:
 # by .swift-version, unless SWIFT_SNAPSHOT is specified.
 matrix:
   include:
-    - os: linux
-      dist: trusty
-      sudo: required
-      env: SWIFT_SNAPSHOT=3.1.1
     - os: linux
       dist: trusty
       sudo: required
@@ -35,11 +31,12 @@ matrix:
       dist: trusty
       sudo: required
       services: docker
-      env: DOCKER_IMAGE=ubuntu:18.04
-    - os: osx
-      osx_image: xcode8.3
+      env: DOCKER_IMAGE=ubuntu:16.04 SWIFT_SNAPSHOT=$SWIFT_DEVELOPMENT_SNAPSHOT
+    - os: linux
+      dist: trusty
       sudo: required
-      env: SWIFT_SNAPSHOT=3.1.1
+      services: docker
+      env: DOCKER_IMAGE=ubuntu:18.04
     - os: osx
       osx_image: xcode9.2
       sudo: required
@@ -51,6 +48,10 @@ matrix:
     - os: osx
       osx_image: xcode10
       sudo: required
+    - os: osx
+      osx_image: xcode10.1
+      sudo: required
+      env: SWIFT_SNAPSHOT=$SWIFT_DEVELOPMENT_SNAPSHOT
 
 before_install:
   - git clone https://github.com/IBM-Swift/Package-Builder.git

Package.pins

@@ -1,3 +1,6 @@
+// swift-tools-version:4.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
 /**
  * Copyright IBM Corporation 2016, 2017
  *
@@ -18,9 +21,18 @@ import PackageDescription
 
 let package = Package(
     name: "LoggerAPI",
-    targets: [
-        Target(
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
             name: "LoggerAPI",
-            dependencies: []),
+            targets: ["LoggerAPI"]
+        )
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "LoggerAPI"
+        )
     ]
 )