Squashed 'libs/cli11/' content from commit dcbcb47

git-subtree-dir: libs/cli11
git-subtree-split: dcbcb4721dda5dab0a56d9faaaee50e6a30f7758

tests/DeprecatedTest.cpp

@@ -0,0 +1,14 @@
+// Copyright (c) 2017-2022, University of Cincinnati, developed by Henry Schreiner
+// under NSF AWARD 1414736 and by the respective contributors.
+// All rights reserved.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
+#include "app_helper.hpp"
+
+using Catch::Matchers::Contains;
+
+TEST_CASE("Deprecated: Empty", "[deprecated]") {
+    // No deprecated features at this time.
+    CHECK(true);
+}