Add .DS_Store file to gitignore (#15)

Signed-off-by: Jonas Uekötter <ueman@users.noreply.github.com>

Author: ueman

.gitignore

@@ -34,3 +34,6 @@ plugins/http2_adapter/.idea/
 plugins/http2_adapter/.exampl
 
 .vscode/
+
+# Miscellaneous
+.DS_Store