ffi (1.13.1) doesn't build on arm64; consider upgrading for dev environments?

[ItsElaineTime]

The version of ffi specified in the Gemfile.lock (1.13.1) doesn't build on arm64 (e.g., M1 Macs).

libtool: link: xcrun clang -dynamiclib  -o .libs/libffi.8.dylib  src/.libs/prep_cif.o src/.libs/types.o src/.libs/raw_api.o src/.libs/java_raw_api.o src/.libs/closures.o src/arm/.libs/ffi.o src/arm/.libs/sysv.o      -install_name  /usr/local/lib/libffi.8.dylib -compatibility_version 10 -current_version 10.0 -Wl,-single_module
Undefined symbols for architecture arm64:
  "_ffi_call", referenced from:
      _ffi_raw_call in raw_api.o
      _ffi_java_raw_call in java_raw_api.o
  "_ffi_closure_trampoline_table_page", referenced from:
      _ffi_trampoline_table_alloc in closures.o
  "_ffi_prep_cif_machdep", referenced from:
      _ffi_prep_cif_core in prep_cif.o
  "_ffi_prep_cif_machdep_var", referenced from:
      _ffi_prep_cif_core in prep_cif.o
  "_ffi_prep_closure_loc", referenced from:
      _ffi_prep_closure in prep_cif.o
      _ffi_prep_raw_closure_loc in raw_api.o
      _ffi_prep_java_raw_closure_loc in java_raw_api.o
ld: symbol(s) not found for architecture arm64

[ItsElaineTime]

There might be some hackery to get this working, but maybe we should just upgrade?

1.15.5 builds cleanly, the tests pass, and there doesn't seem to be anything obviously incompatible?