Make Swift 5 version default Package.swift

Drops the Swift 3 variant. The Swift 4 variant
is still kept, maybe working as a fallback.
Updated the Travis configs to include Swift 5.

Author: helje5

.travis.yml

@@ -13,10 +13,18 @@ matrix:
           dist: trusty
           env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-4.1-release/ubuntu1404/swift-4.1-RELEASE/swift-4.1-RELEASE-ubuntu14.04.tar.gz"
           sudo: required
+        - os:   Linux
+          dist: trusty
+          env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-5.0.2-release/ubuntu1404/swift-5.0.2-RELEASE/swift-5.0.2-RELEASE-ubuntu14.04.tar.gz"
+          sudo: required
+        - os:   Linux
+          dist: xenial
+          env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-5.3.1-release/ubuntu1604/swift-5.3.1-RELEASE/swift-5.3.1-RELEASE-ubuntu16.04.tar.gz"
+          sudo: required
         - os:   osx
-          osx_image: xcode9
+          osx_image: xcode12
         - os:   osx
-          osx_image: xcode9.3
+          osx_image: xcode11.4
 
 
 before_install:

Package.swift

@@ -1,15 +1,11 @@
+// swift-tools-version:5.0
 import PackageDescription
 
 let package = Package(
   name: "jQuery",
-
-  targets: [ Target(name: "jQuery") ],
-
-  dependencies: [
+  products: [
+    .library(name: "jQuery", targets: ["jQuery"])
   ],
-	
-  exclude: [
-    "Makefile",
-    "README.md"
-  ]
+  dependencies: [],
+  targets: [ .target(name: "jQuery") ]
 )