Add in grapheme break data testing infrastructure

Author: milseman

Diff for: Package.swift

@@ -26,6 +26,7 @@ let package = Package(
     targets: [
         // Targets are the basic building blocks of a package. A target can define a module or a test suite.
         // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(name: "TestSupport", dependencies: []),
         .target(
             name: "Util",
             dependencies: []),
@@ -49,7 +50,7 @@ let package = Package(
             dependencies: ["Regex"]),
         .testTarget(
             name: "RegexDSLTests",
-            dependencies: ["RegexDSL"]),
+            dependencies: ["RegexDSL", "TestSupport"]),
         .executableTarget(
             name: "VariadicsGenerator",
             dependencies: [