ulab: update to 0.51.1

jepler · jepler · commit 783846c6057f · 2020-07-01T10:00:28.000-05:00
diff --git a/extmod/ulab b/extmod/ulab
@@ -1 +1 @@
-Subproject commit 0394801933f6e68a5bc7cdb0da76c7884e8cf70a
+Subproject commit 48cb939839fcf091fcdcdf742530b1b650066a15
