Installation from source fails due to missing configuration

[dikwickley]

Python version: 3.11.6 When building from source by following steps mentioned in README (https://github.com/weecology/retriever#to-install-from-source)

// after cloning and running
pip install . -U

Trying to run retriever ls gives the following error

(env) aniket@air retriever % retriever ls    
Traceback (most recent call last):
  File "/Users/aniket/Projects/gsoc/retriever/env/bin/retriever", line 5, in <module>
    from retriever.__main__ import main
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/__init__.py", line 7, in <module>
    from retriever.lib.engine_tools import set_proxy, create_home_dir
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/__init__.py", line 4, in <module>
    from .datasets import datasets
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/datasets.py", line 1, in <module>
    from retriever.lib.scripts import SCRIPT_LIST, get_script, get_dataset_names_upstream
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/scripts.py", line 506, in <module>
    global_script_list = StoredScripts()
                         ^^^^^^^^^^^^^^^
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/scripts.py", line 495, in __init__
    self._shared_scripts = SCRIPT_LIST()
                           ^^^^^^^^^^^^^
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/scripts.py", line 115, in SCRIPT_LIST
    return reload_scripts()
           ^^^^^^^^^^^^^^^^
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/scripts.py", line 59, in reload_scripts
    if not check_retriever_minimum_version(read_script):
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/retriever/lib/scripts.py", line 32, in check_retriever_minimum_version
    if not parse_version(VERSION) >= parse_version("{}".format(mod_ver)):
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/aniket/Projects/gsoc/retriever/env/lib/python3.11/site-packages/pkg_resources/_vendor/packaging/version.py", line 198, in __init__
    raise InvalidVersion(f"Invalid version: '{version}'")
pkg_resources.extern.packaging.version.InvalidVersion: Invalid version: ''

This is happening because a few json files under /scripts are missing the "retriever_minimum_version" property.