Update nmodl with last fixes (#531)

Nicolas Cornu · web-flow · commit 8380a62574ed · 2021-04-20T21:39:26.000+02:00
diff --git a/external/nmodl b/external/nmodl
@@ -1 +1 @@
-Subproject commit 07c7267998e2066f744885e43b88a595aa5f5591
+Subproject commit dcaf303566bf4a183cf667e31a45a680c7a006fe
