update frontier version

hging · hging · commit beae67e1ae85 · 2021-03-15T14:54:55.000+08:00
diff --git a/vendor/frontier b/vendor/frontier
@@ -1 +1 @@
-Subproject commit c4f60f03a0fce60cfdd770cd3b353010f1dea94e
+Subproject commit a2817a8fa0a158eb42b462140c89685fa1b8f3c1
