Do release builds in the plugin

Was suggested in #90 (comment) and I think it makes sense since the main use case of the plugin is probably to test "real" projects which are more likely to not work in debug builds.

Author: neonichu

Plugins/launch-xcode/launch-xcode.swift

@@ -20,7 +20,7 @@ struct LaunchXcode: CommandPlugin {
         print("This command is only supported on macOS")
         return
         #else
-        let buildResult = try packageManager.build(.all(includingTests: false), parameters: .init(echoLogs: true))
+        let buildResult = try packageManager.build(.all(includingTests: false), parameters: .init(configuration: .release, echoLogs: true))
         guard buildResult.succeeded else { return }
         guard let buildServiceURL = buildResult.builtArtifacts.map({ $0.url }).filter({ $0.lastPathComponent == "SWBBuildServiceBundle" }).first else {
             print("Failed to determine path to built SWBBuildServiceBundle")