Move to OCaml 5.0; removing zoo and aeos

move to OCaml 5.0 by changing a line in the dune file in base
removing the zoo module
remove the aeos module

Currently the make test still returns error message on my machine:

File "test/dune", line 2, characters 8-19:
2 |  (names test_runner)
            ^^^^^^^^^^^
(cd _build/default/test && ./test_runner.exe)
Command got signal SEGV.

EDIT:

I checked the test cases, and found that as long as I remove the following two test sets, make test works fine:

"linear algebra", Unit_linalg.test_set second test
("algodiff matrix", Unit_algodiff_matrix.[ Reverse.test; Forward.test ])

owlbarn / owl

Move to OCaml 5.0; removing zoo and aeos #630