add re and yojson to opam file (again?)

lustrec.opam

@@ -26,6 +26,8 @@ depends: [
   "yojson"
   "zarith"
   "dune-site"
+  "re" {with-test}
+  "yojson" {with-test}
   "conf-mpfr" {with-test}
   "conf-cmake" {with-test}
   "conf-openjdk" {with-test}