Merge pull request #6 from SwiftPackageIndex/docc

Add basic docc support

Author: finestructure

.spi.yml

@@ -1,5 +1,7 @@
 version: 1
 builder:
   configs:
+  - platform: macos-spm
+    documentation_target: SemanticVersion
   - platform: watchos
-	scheme: SemanticVersion-watchOS
+    scheme: SemanticVersion-watchOS

Package.resolved

@@ -1,4 +1,4 @@
-// swift-tools-version:4.2
+// swift-tools-version:5.3
 
 // Copyright 2020-2021 Dave Verwer, Sven A. Schmidt, and other contributors.
 //
@@ -29,3 +29,10 @@ let package = Package(
         .testTarget(name: "SemanticVersionTests", dependencies: ["SemanticVersion"]),
     ]
 )
+
+#if swift(>=5.6)
+// Add the documentation compiler plugin if possible
+package.dependencies.append(
+    .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0")
+)
+#endif