Pulled mimalloc version 1.6.1 from upstream

octavonce · octavonce · commit 672adc2c480b · 2020-02-18T11:19:33.000Z
diff --git a/libmimalloc-sys/c_src/mimalloc b/libmimalloc-sys/c_src/mimalloc
@@ -1 +1 @@
-Subproject commit 0a77b7423f5beb4fb88def78cae84cdb368f0c8c
+Subproject commit 6e1ca96a4965c776c10698c24dae576523178ef5
