OCaml 5.3 support

[kit-ty-kate]

Using the latest release of ppxlib_jane v0.17.1 (upgrading to OCaml 5.3), ppx_bin_prot fails with:

#=== ERROR while compiling ppx_bin_prot.v0.17.0 ===============================#
# context              2.4.0~alpha1~dev | linux/x86_64 | ocaml-variants.5.3.0+trunk | file:///home/opam/opam-repository
# path                 ~/.opam/5.3/.opam-switch/build/ppx_bin_prot.v0.17.0
# command              ~/.opam/5.3/bin/dune build -p ppx_bin_prot -j 1
# exit-code            1
# env-file             ~/.opam/log/ppx_bin_prot-19-a3be7b.env
# output-file          ~/.opam/log/ppx_bin_prot-19-a3be7b.out
### output ###
# (cd _build/default && /home/opam/.opam/5.3/bin/ocamlopt.opt -w -40 -g -I src/.ppx_bin_prot.objs/byte -I src/.ppx_bin_prot.objs/native -I /home/opam/.opam/5.3/lib/base -I /home/opam/.opam/5.3/lib/base/base_internalhash_types -I /home/opam/.opam/5.3/lib/base/shadow_stdlib -I /home/opam/.opam/5.3/lib/ocaml-compiler-libs/common -I /home/opam/.opam/5.3/lib/ocaml-compiler-libs/shadow -I /home/opam/.opam/5.3/lib/ocaml/compiler-libs -I /home/opam/.opam/5.3/lib/ocaml_intrinsics_kernel -I /home/opam/.opam/5.3/lib/ppx_derivers -I /home/opam/.opam/5.3/lib/ppx_here/expander -I /home/opam/.opam/5.3/lib/ppxlib -I /home/opam/.opam/5.3/lib/ppxlib/ast -I /home/opam/.opam/5.3/lib/ppxlib/astlib -I /home/opam/.opam/5.3/lib/ppxlib/print_diff -I /home/opam/.opam/5.3/lib/ppxlib/stdppx -I /home/opam/.opam/5.3/lib/ppxlib/traverse_builtins -I /home/opam/.opam/5.3/lib/ppxlib_jane -I /home/opam/.opam/5.3/lib/sexplib0 -I /home/opam/.opam/5.3/lib/stdlib-shims -I shape/src/.bin_shape_expand.objs/byte -I shape/src/.bin_shape_expand.objs/native -intf-suffix .ml -no-alias-deps -o src/.ppx_bin_prot.objs/native/ppx_bin_prot.cmx -c -impl src/ppx_bin_prot.pp.ml)
# File "src/ppx_bin_prot.ml", line 12, characters 11-47:
# 12 |   type t = Ppxlib_jane.Ast_builder.Default.mode option
#                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
# Error: Unbound type constructor "Ppxlib_jane.Ast_builder.Default.mode"
# (cd _build/default && /home/opam/.opam/5.3/bin/ocamlc.opt -w -40 -g -bin-annot -bin-annot-occurrences -I src/.ppx_bin_prot.objs/byte -I /home/opam/.opam/5.3/lib/base -I /home/opam/.opam/5.3/lib/base/base_internalhash_types -I /home/opam/.opam/5.3/lib/base/shadow_stdlib -I /home/opam/.opam/5.3/lib/ocaml-compiler-libs/common -I /home/opam/.opam/5.3/lib/ocaml-compiler-libs/shadow -I /home/opam/.opam/5.3/lib/ocaml/compiler-libs -I /home/opam/.opam/5.3/lib/ocaml_intrinsics_kernel -I /home/opam/.opam/5.3/lib/ppx_derivers -I /home/opam/.opam/5.3/lib/ppx_here/expander -I /home/opam/.opam/5.3/lib/ppxlib -I /home/opam/.opam/5.3/lib/ppxlib/ast -I /home/opam/.opam/5.3/lib/ppxlib/astlib -I /home/opam/.opam/5.3/lib/ppxlib/print_diff -I /home/opam/.opam/5.3/lib/ppxlib/stdppx -I /home/opam/.opam/5.3/lib/ppxlib/traverse_builtins -I /home/opam/.opam/5.3/lib/ppxlib_jane -I /home/opam/.opam/5.3/lib/sexplib0 -I /home/opam/.opam/5.3/lib/stdlib-shims -I shape/src/.bin_shape_expand.objs/byte -intf-suffix .ml -no-alias-deps -o src/.ppx_bin_prot.objs/byte/ppx_bin_prot.cmo -c -impl src/ppx_bin_prot.pp.ml)
# File "src/ppx_bin_prot.ml", line 12, characters 11-47:
# 12 |   type t = Ppxlib_jane.Ast_builder.Default.mode option
#                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
# Error: Unbound type constructor "Ppxlib_jane.Ast_builder.Default.mode"

[kit-ty-kate]

was fixed in ppxlib_jane.v0.17.2