Update Package@swift-5.5.swift

Pin SwiftSemantics to main.  This is required since the 0.3.1 release of SwiftSemantics pins SwiftSyntax to 4ae758ab85ed2a5d3e3e8b5050a8ce52179bd102 and SwiftSyntaxHighlighter requires release/5.5.  In order to restore the ability to resolve the dependencies, we need to bump SwiftSemantics to main.

Author: compnerd

Package@swift-5.5.swift

@@ -14,7 +14,7 @@ let package = Package(
     ],
     dependencies: [
         .package(name: "SwiftSyntax", url: "https://github.com/apple/swift-syntax.git", .revision("release/5.5")),
-        .package(url: "https://github.com/SwiftDocOrg/SwiftSemantics.git", .upToNextMinor(from: "0.3.0")),
+        .package(url: "https://github.com/SwiftDocOrg/SwiftSemantics.git", .revision("main")),
         .package(url: "https://github.com/SwiftDocOrg/CommonMark.git", .upToNextMinor(from: "0.5.0")),
         .package(url: "https://github.com/SwiftDocOrg/SwiftMarkup.git", .upToNextMinor(from: "0.3.0")),
         .package(url: "https://github.com/SwiftDocOrg/GraphViz.git", .upToNextMinor(from: "0.4.1")),