This reverts commit 438e828eb5.

# Conflicts:
#	test/pyenv_ext.bats

Fix not printing asterisk for current version in Bash 3

Use a better PS4 as recommeneded by Bash Hackers Wiki

Create 3.10.0a5

it allows to see functions as well as lines, therefore making it possible to see the control flow

"system" python - support cases where python3, python2 is in PATH but not python

Fixed Miniconda 4.9.2 for MacOSX-x86_64

[python-build] Support PYENV_DEBUG

Added fallback to system executable

fixes #1805

Use associative arrays for performance on bash >= 4

"hyperfine pyenv-versions" before with my bash 4.4:

Time (mean ± σ):    81.7 ms ±   2.2 ms  [User: 67.8 ms, System: 15.7 ms]
Range (min … max):  78.3 ms …  87.2 ms  34 runs

After:

Time (mean ± σ):    70.6 ms ±   2.4 ms  [User: 55.6 ms, System: 16.9 ms]
Range (min … max):  67.9 ms …  78.9 ms  41 runs

"hyperfine pyenv-rehash" before on my bash 4.4:

Time (mean ± σ):   172.8 ms ±   8.2 ms [User: 185.0 ms, System: 24.8 ms]
Range (min … max): 164.2 ms … 198.4 ms 15 runs

After:

Time (mean ± σ):   113.8 ms ±   2.8 ms [User: 127.1 ms, System: 26.1 ms]
Range (min … max): 108.0 ms … 117.6 ms 25 runs

rehash: try to sleep in 0.1 sec steps when acquiring lock

Add miniconda3 4.8.2, 4.8.3, & 4.9.2

Add PyPy 3.6 versions 7.3.2 and 7.3.3

If pyenv doesn't find an executable for the current version/virtualenv,
then search the "system" version as a fallback.

PyPy version 3.6-7.3.3-src

PyPy version 3.6-7.3.3

PyPy version 3.6-7.3.2-src

PyPy 3.6 version 7.3.2

The file was in the wrong location!

Try for that long no matter what the sleep step available is.

README: note optional bash extension build

README section on using pyenv without "pyenv init"

Fix get-pip which dropped support for legacy Python

Fix pyenv to continue to support legacy Python builds despite the fact that `get-pip` has dropped support for Python 2 as discussed in pypa/get-pip#87

more general installation readme instructions

corrected fish shell command

Added Miniforge 3

OS X arm64 will be installed with Python 3.9 only. Other versions bundled with python 3.8. Miniforge does not have as wide a choice of python versions as miniconda.
The Python version is specific only to the base environment.

Add pypy3.7

Add PyPy 3.7-7.3.2 (binary distribution)

Add PyPy 3.7-7.3.2 (source distribution)

Use verify_py38 for anaconda3-2020.07