v1.5增加一个舵机控制前档，实现踢球效果。

v1.5/lib/FastLED/tests/test_mutex.cpp

@@ -0,0 +1,18 @@
+#include "test.h"
+
+#include "fl/mutex.h"
+
+
+TEST_CASE("Mutex reentrant") {
+    // Tests that the lock can be acquired multiple times by the same thread.
+    {
+        fl::mutex m;
+        fl::lock_guard<fl::mutex> lock(m);
+        {
+            // This will deadlock.
+            bool acquired_recursively = m.try_lock();
+            CHECK_EQ(acquired_recursively, true);
+            m.unlock();
+        }
+    }
+}