Add Swift starter template

ci/properties/swift.properties.json

@@ -0,0 +1,6 @@
+{
+    "name": "Swift",
+    "description": "Build and test a Swift Package.",
+    "iconName": "swift",
+    "categories": ["Swift"]
+}

ci/swift.yml

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+name: Swift
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: macOS-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Build
+      run: swift build -v
+    - name: Run tests
+      run: swift test -v

icons/swift.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg width="40px" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 40 36" version="1.1" height="36px">
+ <defs>
+  <linearGradient id="a" x2="50%" x1="50%" y2="100%">
+   <stop stop-color="#F88A36" offset="0"/>
+   <stop stop-color="#FD2020" offset="1"/>
+  </linearGradient>
+ </defs>
+ <path d="m29.885 33.047c-4.667 2.696-11.084 2.973-17.54 0.206-5.2273-2.224-9.5646-6.117-12.345-10.565 1.3346 1.112 2.8916 2.002 4.5598 2.78 6.6672 3.125 13.333 2.911 18.024 0.008-0.003-0.003-0.005-0.005-0.007-0.008-6.673-5.116-12.345-11.789-16.571-17.238-0.8901-0.8898-1.5574-2.002-2.2247-3.0029 5.1159 4.671 13.235 10.565 16.126 12.234-6.116-6.451-11.566-14.458-11.344-14.236 9.676 9.787 18.685 15.348 18.685 15.348 0.298 0.168 0.528 0.308 0.713 0.433 0.195-0.496 0.366-1.011 0.51-1.545 1.557-5.672-0.222-12.123-4.115-17.461 9.008 5.4495 14.347 15.681 12.122 24.245-0.058 0.231-0.121 0.459-0.189 0.683 0.026 0.031 0.052 0.063 0.078 0.096 4.448 5.561 3.225 11.455 2.669 10.343-2.413-4.722-6.88-3.278-9.151-2.32z" fill="url(#a)"/>
+</svg>