Installed tool requires that `python` be the correct executable

[danielhoherd]

Description

pip install flameprof requires that python be the correct version of the executable. For those of us running python3 where python still points to python2, this causes a problem.

Steps to reproduce

1. On macOS 10.15 running python3 from homebrew, run pip3 install --user flameprof
2. $ cat $(which flameprof) will output:

   #!/bin/sh
   exec python -m flameprof "$@"
   

3. python --version will output Python 2.7.17

Proposed solution

The first way I can think of to solve this is to write the contents of flameprof with an explicit version numbered interpreter, IE: python2 or python3, as determined by the version running when installed. That seems fragile, but less fragile than what exists today.

[danielhoherd]

This is solved by #5