update png dependency

Author: tayloraswift

.travis.yml

@@ -1,10 +1,11 @@
 language: generic
-sudo: required
-dist: trusty
-env:
-- SWIFT_BRANCH=swift-4.0-branch SWIFT_VERSION=swift-4.0-DEVELOPMENT-SNAPSHOT-2017-08-02-a
-install:
-- mkdir swift
-- curl https://swift.org/builds/$SWIFT_BRANCH/ubuntu1404/$SWIFT_VERSION/$SWIFT_VERSION-ubuntu14.04.tar.gz -s | tar xz -C swift &> /dev/null
-script:
-- env PATH=$(pwd)/swift/$SWIFT_VERSION-ubuntu14.04/usr/bin:$PATH swift test -c release
+matrix:
+  include:
+  - os: linux
+    env:
+    - JOB="Linux"
+    dist: trusty
+    script:
+    - export SWIFT_VERSION=4.2.1
+    - eval "$(curl -sL https://gist.githubusercontent.com/kylef/5c0475ff02b7c7671d2a/raw/9f442512a46d7a2af7b850d65a7e9bd31edfb09b/swiftenv-install.sh)"
+    - swift run -c release noise-tests

Package.swift

@@ -1,22 +1,21 @@
-// swift-tools-version:4.0
+// swift-tools-version:4.2
 
 import PackageDescription
 
 let package = Package(
     name: "Noise",
-    products: [
-        .library(name: "Noise", targets: ["Noise"])
+    products: 
+    [
+        .library(name: "Noise", targets: ["Noise"]),
+        .executable(name: "noise-tests", targets: ["NoiseTests"])
     ],
-    dependencies: [
-        .package(url: "https://github.com/kelvin13/maxpng", from: "2.0.0")
+    dependencies: 
+    [
+        .package(url: "https://github.com/kelvin13/png", .exact("3.0.0"))
     ],
-    targets: [
-        .target(
-            name: "Noise",
-            path: "sources/noise"),
-        .testTarget(
-            name: "Tests",
-            dependencies: ["Noise", "MaxPNG"],
-            path: "tests/noise"),
+    targets: 
+    [
+        .target(name: "Noise", path: "sources/noise"),
+        .target(name: "NoiseTests", dependencies: ["Noise", "PNG"], path: "tests/noise")
     ]
 )

README.md

@@ -16,4 +16,4 @@
 
 ## Building
 
-Build *Noise* with the Swift Package Manager. *Noise* itself has no dependencies, but the tests depend on [MaxPNG](https://github.com/kelvin13/maxpng), my free Swift PNG library, to view the generated noise.
+Build *Noise* with the Swift Package Manager. *Noise* itself has no dependencies, but the tests depend on [PNG](https://github.com/kelvin13/png), my free Swift PNG library, to view the generated noise.