Drop the pre Swift 5 Package.swift

... build on new platforms.

Author: helje5

.gitignore

@@ -70,4 +70,5 @@ fastlane/test_output
 .build-linux*
 Package.resolved
 dump*.json
+.swiftpm
 

.travis.yml

@@ -7,16 +7,18 @@ matrix:
     include:
         - os:   Linux
           dist: trusty
-          env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-4.2.3-release/ubuntu1404/swift-4.2.3-RELEASE/swift-4.2.3-RELEASE-ubuntu14.04.tar.gz"
+          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: trusty
-          env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-5.0-release/ubuntu1404/swift-5.0-RELEASE/swift-5.0-RELEASE-ubuntu14.04.tar.gz"
+          env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-5.1.3-release/ubuntu1404/swift-5.1.3-RELEASE/swift-5.1.3-RELEASE-ubuntu14.04.tar.gz"
+          sudo: required
+        - os:   Linux
+          dist: xenial
+          env:  SWIFT_SNAPSHOT_NAME="https://swift.org/builds/swift-5.2-release/ubuntu1604/swift-5.2-RELEASE/swift-5.2-RELEASE-ubuntu16.04.tar.gz"
           sudo: required
         - os:   osx
-          osx_image: xcode10.1
-        - os:   osx
-          osx_image: xcode10.2
+          osx_image: xcode11
 
 
 before_install:

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:4.2
+// swift-tools-version:5.0
 
 import PackageDescription
 
@@ -9,7 +9,7 @@ let package = Package(
     ],
     dependencies: [
         .package(url: "https://github.com/apple/swift-nio.git", 
-                 from: "1.13.2")
+                 from: "2.18.0")
     ],
     targets: [
         .target(name: "NIOIRC", dependencies: [ "NIO" ])