add support for pandas version 2

[rpreen]

Some (minor) changes for compatibility with Pandas >=2.

Resolves #149

• No functional changes were required that modify existing behaviour;
• Changes dependencies to allow pandas v2: pandas>1.5.0,<2.3
  • This means that pandas no longer has to be built from source for Python 3.12 (more seamless install)
• Drops Python 3.8, which is end of life
• Adds Python 3.13 (but see notes)
• CI confirms Python 3.9--3.12 all work on ubuntu, Windows, and macOS;
• CI confirms Python 3.13 works on ubuntu and macOS; however pytest fails on Windows with Windows fatal exception: access violation probably due to numpy (see below); so this has been put in a separate CI runner
• Python 3.13 manual installation/tests in a Windows VM: numpy was able to be built from source and the tests all completed fine with the exception of some error about tkinter, which seems to be a generic issue with running tkinter in virtual environments with Python 3.13
• Test notebook produces same output with Pandas 1.5.3 and 2.2.3
• Bumps acro version to v0.4.7

Note:

Numpy only has wheels for Python 3.13 for version >=2.1 so it has to be built from source (requiring C++ build tools) for the version acro currently uses: 1.26.4 since we do not support version 2 yet. The note in the README has been updated to reflect this.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.16%. Comparing base (9cf620d) to head (04425eb).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #237   +/-   ##
=======================================
  Coverage   99.16%   99.16%           
=======================================
  Files           9        9           
  Lines        1199     1201    +2     
=======================================
+ Hits         1189     1191    +2     
  Misses         10       10           

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