DBG: update number?

Author: punchagan

Makefile

@@ -136,7 +136,7 @@ _opam/%: _opam/opam-init/init.sh ocaml-versions/%.json
 	opam update
 	OCAMLRUNPARAM="$(OCAML_RUN_PARAM)" OCAMLCONFIGOPTION="$(OCAML_CONFIG_OPTION)" opam switch create --keep-build-dir --yes $* ocaml-base-compiler.$*
 	@{ case "$*" in \
-		*5.1*) opam pin add -n --yes --switch $* sexplib0.v0.15.0 https://github.com/shakthimaan/sexplib0.git#multicore; \
+		*5.1*) opam pin add -n --yes --switch $* sexplib0.v0.16.0 https://github.com/shakthimaan/sexplib0.git#multicore; \
 	esac };
 	# TODO remove pin when a new orun version is released on opam
 	opam pin add -n --yes --switch $* orun https://github.com/ocaml-bench/orun.git