Override shackle-match since my PR got rejected

[dotemacs] / packages / shackle

diff --git a/packages/shackle b/packages/shackle
index 1e40f3519518b0efef76c70e8f6e5666b8eb5745..4189c1c773aab533969b587f7801ffbcd1d7d613 160000 (submodule)
--- a/packages/shackle
+++ b/packages/shackle
@@ -1 +1 @@
-Subproject commit 1e40f3519518b0efef76c70e8f6e5666b8eb5745
+Subproject commit 4189c1c773aab533969b587f7801ffbcd1d7d613