fix:内存泄露

tests/test_simple.c

@@ -1,8 +1,7 @@
 #include "logging.h"
 
 int main() {
-    Logging *log    = newLogging();
-    Logger  *logger = log->getLogger("testLogger", LOG_DEBUG);
+    Logger *logger = newLogger("testLogger", LOG_DEBUG);
 
     logger->info("This is an info message");
     logger->error("This is an error message%s", "123");
@@ -10,6 +9,6 @@ int main() {
     logger->debug("This is a debug message");
     logger->warning("This is a warning message%s", "123");
 
-    log->destroyLogging(log);
+    destroyLogger();
     return 0;
 }