update hdmf-common submodule

rly · rly · commit eb6b53e9c27c · 2020-01-06T16:59:42.000-08:00
diff --git a/hdmf-common-schema b/hdmf-common-schema
@@ -1 +1 @@
-Subproject commit 856b7db118a7ae65826693a291accdc91c87bef9
+Subproject commit c468f3cf638e532ff3dca01dd43469e7125629fc
