Update numba requirement (#879)

Updates the requirements on [numba](https://github.com/numba/numba) to permit the latest version.
- [Release notes](https://github.com/numba/numba/releases)
- [Commits](numba/numba@0.50.0...0.59.0)

---
updated-dependencies:
- dependency-name: numba
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

setup.py

@@ -65,7 +65,7 @@ def readme():
         "pydantic>=1.8.0, <3.0.0",
         "toml>=0.10.1, <1.0.0",  # STC, see https://discuss.python.org/t/adopting-recommending-a-toml-parser/4068
         "catalogue>=2.0.0, <3.0.0",
-        "numba>=0.50.0, !=0.54.0, <0.59.0",  # Avoid 0.54 due to: https://github.com/SeldonIO/alibi/issues/466
+        "numba>=0.50.0, !=0.54.0, <0.60.0",  # Avoid 0.54 due to: https://github.com/SeldonIO/alibi/issues/466
         "typing-extensions>=3.7.4.3"
     ],
     extras_require=extras_require,