Utilities for handling packages

 Module developed with the aim of assisting the developer in managing
 packages with the following functions:
  - Returns the web links for the given project.
  - Useful for creating and verifying sha256 checksums of files.
  - Useful for working with trove classifiers.
  - Useful for working with the Python Package Index (PyPI).
  - Useful for working with PEP 508 requirements.
  - Useful for working with source distributions.
  - Serves to assist in building conda packages.
  - Returns the subset of versions that do not end with -dev.
  - Returns the subset of versions that are not pre-releases
    (alpha, beta, dev, rc etc.).
    packages.
  - Reads the pyvenv.cfg for the given virtualenv and returns a key:
    value mapping of your content.
  - among other features.