submodule update

vsukhor · vsukhor · commit 2cad6061e986 · 2021-05-26T18:22:43.000+02:00
diff --git a/external b/external
@@ -1 +1 @@
-Subproject commit b9fa677de9ed22f27e25ecd95d18ca428cf0eca8
+Subproject commit c877d9e878700099afcd7fe86fe372e4652743c1
