phylogenetics 0.2 needs upper bound on core

Failure
```
 (cd _build/default && /home/opam/.opam/5.2/bin/ocamlopt.opt -w -40 -g -I lib/.phylogenetics.objs/byte -I lib/.phylogenetics.objs/native -I /home/opam/.opam/5.2/lib/angstrom -I /home/opam/.opam/5.2/lib/angstrom-unix -I /home/opam/.opam/5.2/lib/base -I /home/opam/.opam/5.2/lib/base/base_internalhash_types -I /home/opam/.opam/5.2/lib/base/caml -I /home/opam/.opam/5.2/lib/base/md5 -I /home/opam/.opam/5.2/lib/base/shadow_stdlib -I /home/opam/.opam/5.2/lib/base_bigstring -I /home/opam/.opam/5.2/lib/base_quickcheck -I /home/opam/.opam/5.2/lib/base_quickcheck/ppx_quickcheck/runtime -I /home/opam/.opam/5.2/lib/bigstringaf -I /home/opam/.opam/5.2/lib/bin_prot -I /home/opam/.opam/5.2/lib/bin_prot/shape -I /home/opam/.opam/5.2/lib/binning -I /home/opam/.opam/5.2/lib/biotk -I /home/opam/.opam/5.2/lib/biotk/croquis -I /home/opam/.opam/5.2/lib/core -I /home/opam/.opam/5.2/lib/core/base_for_tests -I /home/opam/.opam/5.2/lib/core/command -I /home/opam/.opam/5.2/lib/core/filename_base -I /home/opam/.opam/5.2/lib/core/heap_block -I /home/opam/.opam/5.2/lib/core/univ_map -I /home/opam/.opam/5.2/lib/core/validate -I /home/opam/.opam/5.2/lib/core_kernel -I /home/opam/.opam/5.2/lib/core_kernel/binary_packing -I /home/opam/.opam/5.2/lib/core_kernel/caml_threads -I /home/opam/.opam/5.2/lib/core_kernel/caml_unix -I /home/opam/.opam/5.2/lib/core_kernel/flags -I /home/opam/.opam/5.2/lib/core_unix -I /home/opam/.opam/5.2/lib/core_unix/error_checking_mutex -I /home/opam/.opam/5.2/lib/core_unix/signal_unix -I /home/opam/.opam/5.2/lib/csvfields -I /home/opam/.opam/5.2/lib/csvfields/csvlib -I /home/opam/.opam/5.2/lib/csvfields/xml-light -I /home/opam/.opam/5.2/lib/fieldslib -I /home/opam/.opam/5.2/lib/fmt -I /home/opam/.opam/5.2/lib/gg -I /home/opam/.opam/5.2/lib/gsl -I /home/opam/.opam/5.2/lib/int_repr -I /home/opam/.opam/5.2/lib/jane-street-headers -I /home/opam/.opam/5.2/lib/lacaml -I /home/opam/.opam/5.2/lib/menhirLib -I /home/opam/.opam/5.2/lib/num -I /home/opam/.opam/5.2/lib/ocaml/threads -I /home/opam/.opam/5.2/lib/ocaml/unix -I /home/opam/.opam/5.2/lib/otfm -I /home/opam/.opam/5.2/lib/parsexp -I /home/opam/.opam/5.2/lib/ppx_assert/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_bench/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_compare/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_deriving/runtime -I /home/opam/.opam/5.2/lib/ppx_enumerate/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_expect/collector -I /home/opam/.opam/5.2/lib/ppx_expect/common -I /home/opam/.opam/5.2/lib/ppx_expect/config -I /home/opam/.opam/5.2/lib/ppx_expect/config_types -I /home/opam/.opam/5.2/lib/ppx_hash/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_here/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_inline_test/config -I /home/opam/.opam/5.2/lib/ppx_inline_test/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_log/types -I /home/opam/.opam/5.2/lib/ppx_module_timer/runtime -I /home/opam/.opam/5.2/lib/ppx_sexp_conv/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_stable_witness/runtime -I /home/opam/.opam/5.2/lib/ppx_stable_witness/stable_witness -I /home/opam/.opam/5.2/lib/printbox -I /home/opam/.opam/5.2/lib/printbox-text -I /home/opam/.opam/5.2/lib/re -I /home/opam/.opam/5.2/lib/rresult -I /home/opam/.opam/5.2/lib/seq -I /home/opam/.opam/5.2/lib/sexplib -I /home/opam/.opam/5.2/lib/sexplib/unix -I /home/opam/.opam/5.2/lib/sexplib0 -I /home/opam/.opam/5.2/lib/spawn -I /home/opam/.opam/5.2/lib/splittable_random -I /home/opam/.opam/5.2/lib/stdio -I /home/opam/.opam/5.2/lib/stringext -I /home/opam/.opam/5.2/lib/time_now -I /home/opam/.opam/5.2/lib/typerep -I /home/opam/.opam/5.2/lib/tyxml -I /home/opam/.opam/5.2/lib/tyxml/functor -I /home/opam/.opam/5.2/lib/uri -I /home/opam/.opam/5.2/lib/uucp -I /home/opam/.opam/5.2/lib/uutf -I /home/opam/.opam/5.2/lib/variantslib -I /home/opam/.opam/5.2/lib/vg -I /home/opam/.opam/5.2/lib/vg/pdf -I /home/opam/.opam/5.2/lib/yojson -I /home/opam/.opam/5.2/lib/zip -intf-suffix .ml -no-alias-deps -open Phylogenetics -o lib/.phylogenetics.objs/native/phylogenetics__Alignment.cmx -c -impl lib/alignment.pp.ml)
 File "lib/alignment.ml", line 96, characters 64-76:
 96 |   Array.fold al.sequences ~init:Char.Set.empty ~f:(fun acc s -> Char.Set.add acc s.[j])
                                                                      ^^^^^^^^^^^^
 Error: Unbound value "Char.Set.add"
 (cd _build/default && /home/opam/.opam/5.2/bin/ocamlopt.opt -w -40 -g -I lib/.phylogenetics.objs/byte -I lib/.phylogenetics.objs/native -I /home/opam/.opam/5.2/lib/angstrom -I /home/opam/.opam/5.2/lib/angstrom-unix -I /home/opam/.opam/5.2/lib/base -I /home/opam/.opam/5.2/lib/base/base_internalhash_types -I /home/opam/.opam/5.2/lib/base/caml -I /home/opam/.opam/5.2/lib/base/md5 -I /home/opam/.opam/5.2/lib/base/shadow_stdlib -I /home/opam/.opam/5.2/lib/base_bigstring -I /home/opam/.opam/5.2/lib/base_quickcheck -I /home/opam/.opam/5.2/lib/base_quickcheck/ppx_quickcheck/runtime -I /home/opam/.opam/5.2/lib/bigstringaf -I /home/opam/.opam/5.2/lib/bin_prot -I /home/opam/.opam/5.2/lib/bin_prot/shape -I /home/opam/.opam/5.2/lib/binning -I /home/opam/.opam/5.2/lib/biotk -I /home/opam/.opam/5.2/lib/biotk/croquis -I /home/opam/.opam/5.2/lib/core -I /home/opam/.opam/5.2/lib/core/base_for_tests -I /home/opam/.opam/5.2/lib/core/command -I /home/opam/.opam/5.2/lib/core/filename_base -I /home/opam/.opam/5.2/lib/core/heap_block -I /home/opam/.opam/5.2/lib/core/univ_map -I /home/opam/.opam/5.2/lib/core/validate -I /home/opam/.opam/5.2/lib/core_kernel -I /home/opam/.opam/5.2/lib/core_kernel/binary_packing -I /home/opam/.opam/5.2/lib/core_kernel/caml_threads -I /home/opam/.opam/5.2/lib/core_kernel/caml_unix -I /home/opam/.opam/5.2/lib/core_kernel/flags -I /home/opam/.opam/5.2/lib/core_unix -I /home/opam/.opam/5.2/lib/core_unix/error_checking_mutex -I /home/opam/.opam/5.2/lib/core_unix/signal_unix -I /home/opam/.opam/5.2/lib/csvfields -I /home/opam/.opam/5.2/lib/csvfields/csvlib -I /home/opam/.opam/5.2/lib/csvfields/xml-light -I /home/opam/.opam/5.2/lib/fieldslib -I /home/opam/.opam/5.2/lib/fmt -I /home/opam/.opam/5.2/lib/gg -I /home/opam/.opam/5.2/lib/gsl -I /home/opam/.opam/5.2/lib/int_repr -I /home/opam/.opam/5.2/lib/jane-street-headers -I /home/opam/.opam/5.2/lib/lacaml -I /home/opam/.opam/5.2/lib/menhirLib -I /home/opam/.opam/5.2/lib/num -I /home/opam/.opam/5.2/lib/ocaml/threads -I /home/opam/.opam/5.2/lib/ocaml/unix -I /home/opam/.opam/5.2/lib/otfm -I /home/opam/.opam/5.2/lib/parsexp -I /home/opam/.opam/5.2/lib/ppx_assert/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_bench/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_compare/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_deriving/runtime -I /home/opam/.opam/5.2/lib/ppx_enumerate/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_expect/collector -I /home/opam/.opam/5.2/lib/ppx_expect/common -I /home/opam/.opam/5.2/lib/ppx_expect/config -I /home/opam/.opam/5.2/lib/ppx_expect/config_types -I /home/opam/.opam/5.2/lib/ppx_hash/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_here/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_inline_test/config -I /home/opam/.opam/5.2/lib/ppx_inline_test/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_log/types -I /home/opam/.opam/5.2/lib/ppx_module_timer/runtime -I /home/opam/.opam/5.2/lib/ppx_sexp_conv/runtime-lib -I /home/opam/.opam/5.2/lib/ppx_stable_witness/runtime -I /home/opam/.opam/5.2/lib/ppx_stable_witness/stable_witness -I /home/opam/.opam/5.2/lib/printbox -I /home/opam/.opam/5.2/lib/printbox-text -I /home/opam/.opam/5.2/lib/re -I /home/opam/.opam/5.2/lib/rresult -I /home/opam/.opam/5.2/lib/seq -I /home/opam/.opam/5.2/lib/sexplib -I /home/opam/.opam/5.2/lib/sexplib/unix -I /home/opam/.opam/5.2/lib/sexplib0 -I /home/opam/.opam/5.2/lib/spawn -I /home/opam/.opam/5.2/lib/splittable_random -I /home/opam/.opam/5.2/lib/stdio -I /home/opam/.opam/5.2/lib/stringext -I /home/opam/.opam/5.2/lib/time_now -I /home/opam/.opam/5.2/lib/typerep -I /home/opam/.opam/5.2/lib/tyxml -I /home/opam/.opam/5.2/lib/tyxml/functor -I /home/opam/.opam/5.2/lib/uri -I /home/opam/.opam/5.2/lib/uucp -I /home/opam/.opam/5.2/lib/uutf -I /home/opam/.opam/5.2/lib/variantslib -I /home/opam/.opam/5.2/lib/vg -I /home/opam/.opam/5.2/lib/vg/pdf -I /home/opam/.opam/5.2/lib/yojson -I /home/opam/.opam/5.2/lib/zip -intf-suffix .ml -no-alias-deps -open Phylogenetics -o lib/.phylogenetics.objs/native/phylogenetics__Phylo_ctmc.cmx -c -impl lib/phylo_ctmc.pp.ml)
 File "lib/phylo_ctmc.ml", line 162, characters 17-28:
 162 |           set := Int.Set.add !set i ;
                        ^^^^^^^^^^^
 Error: Unbound value "Int.Set.add"
```

Signed-off-by: Marcello Seri <[email protected]>

Author: mseri

packages/phylogenetics/phylogenetics.0.2.0/opam

@@ -11,7 +11,7 @@ depends: [
   "angstrom-unix"
   "binning"
   "biotk" {>= "0.2.0"}
-  "core" {>= "v0.15.0" & < "v0.17.0"}
+  "core" {>= "v0.15.0" & < "v0.16"}
   "dune" {>= "3.6"}
   "gsl"
   "lacaml" {>= "10.0.2"}