Merge pull request #102 from akkyie/fix-swift-syntax-version

Use exact and appropriate versions of SwiftSyntax

Package.swift

@@ -1,6 +1,17 @@
 // swift-tools-version:5.1
 import PackageDescription
 
+var dependencies: [Package.Dependency] = [
+    .package(url: "https://github.com/apple/swift-package-manager.git", .exact("0.5.0")),
+    .package(url: "https://github.com/jpsim/SourceKitten.git", from: "0.26.0"),
+]
+
+#if swift(>=5.2)
+dependencies.append(.package(url: "https://github.com/apple/swift-syntax.git", .exact("0.50200.0")))
+#elseif swift(>=5.1)
+dependencies.append(.package(url: "https://github.com/apple/swift-syntax.git", .exact("0.50100.0")))
+#endif
+
 let package = Package(
     name: "Mockolo",
     platforms: [
@@ -10,11 +21,7 @@ let package = Package(
         .executable(name: "mockolo", targets: ["Mockolo"]),
         .library(name: "MockoloFramework", targets: ["MockoloFramework"]),
         ],
-    dependencies: [
-        .package(url: "https://github.com/apple/swift-package-manager.git", .exact("0.5.0")),
-        .package(url: "https://github.com/jpsim/SourceKitten.git", from: "0.26.0"),
-        .package(url: "https://github.com/apple/swift-syntax.git", from: "0.50100.0"),
-        ],
+    dependencies: dependencies,
     targets: [
         .target(
             name: "Mockolo",