[NFC] Resolve test file's build errors. (#6046)

Author: ncooke3

Tests/FunctionalTests/PluginTests.swift

@@ -463,6 +463,7 @@ class PluginTests: XCTestCase {
                         accessibleTools: [:],
                         writableDirectories: [pluginDir.appending(component: "output")],
                         readOnlyDirectories: [package.path],
+                        pkgConfigDirectories: [],
                         fileSystem: localFileSystem,
                         observabilityScope: observability.topScope,
                         callbackQueue: delegateQueue,
@@ -645,10 +646,14 @@ class PluginTests: XCTestCase {
             XCTAssertNoDiagnostics(observability.diagnostics)
             XCTAssert(packageGraph.packages.count == 1, "\(packageGraph.packages)")
             XCTAssert(packageGraph.rootPackages.count == 1, "\(packageGraph.rootPackages)")
-            let package = try XCTUnwrap(packageGraph.rootPackages.first)
+            let package: ResolvedPackage = try XCTUnwrap(packageGraph.rootPackages.first)
 
             // Find the regular target in our test package.
-            let libraryTarget = try XCTUnwrap(package.targets.map(\.underlyingTarget).first{ $0.name == "MyLibrary" } as? SwiftTarget)
+            let libraryTarget = try XCTUnwrap(
+                package.targets
+                    .map(\.underlyingTarget)
+                    .first{ $0.name == "MyLibrary" } as? SwiftTarget
+            )
             XCTAssertEqual(libraryTarget.type, .library)
 
             // Set up a delegate to handle callbacks from the command plugin.  In particular we want to know the process identifier.
@@ -724,6 +729,7 @@ class PluginTests: XCTestCase {
                 accessibleTools: [:],
                 writableDirectories: [pluginDir.appending(component: "output")],
                 readOnlyDirectories: [package.path],
+                pkgConfigDirectories: [],
                 fileSystem: localFileSystem,
                 observabilityScope: observability.topScope,
                 callbackQueue: delegateQueue,