Update zipapp script

[gpotter2]

• allow the zipapp script to bundle IPython

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.20%. Comparing base (29b5413) to head (16a0087).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4384      +/-   ##
==========================================
+ Coverage   81.56%   82.20%   +0.63%     
==========================================
  Files         352      352              
  Lines       83601    83601              
==========================================
+ Hits        68193    68723     +530     
+ Misses      15408    14878     -530     

see 20 files with indirect coverage changes