Update dependencies to support numpy >=2.0 (#2)

* remove 3.8, add 3.11 to CI

3.8 is not supported by pyproject.toml, seems appropriate to remove and
replace with 3.11

* move pytest-benchmark to a dev dependency

* bump numba version

* specify numpy versions based on py version

seperates numpy versions based on python version, allows numpy >=2.0

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Co-authored-by: sandyspiers <sandy.spiers@curtin.edu.au>

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10"]
+        python-version: ["3.9", "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v3