Upgrade abacus requirements to support elixir 1.17 and OTP 27

[MrYawe]

With elixir 1.17 and OTP 27, mix test will fail with the following error:

==> abacus
Compiling 3 files (.erl)
src/new_parser.yrl:54:7: syntax error before: 'else'
%   54|       {'else', '$5'}
%     |       ^

src/new_parser.erl:819:13: function yeccpars2_46_/1 undefined
%  819|  NewStack = yeccpars2_46_(Stack),
%     |             ^

src/new_parser.yrl:71:2: inlined function yeccpars2_46_/1 undefined
%   71| expr -> expr '/' expr : {'/', [], ['$1', '$3']}.
%     |  ^

could not compile dependency :abacus, "mix compile" failed. Errors may have been logged above. You can recompile this dependency with "mix deps.compile abacus --force", update it with "mix deps.update abacus" or clean it with "mix deps.clean abacus"

I've submitted a pr to abacus https://github.com/narrowtux/abacus/pull/27 to fix it. Abacus requirements will need to be upgraded once it's released.

In the meantime, you can try the fix by using this in mix.exs:

{:abacus, github: "MrYawe/abacus"},