update: add versioning instructions

[cpaniaguam]

• Add versioning instructions to readme
• Update version to v0.4.2

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.64%. Comparing base (d37df4e) to head (8180e39).

:exclamation: Current head 8180e39 differs from pull request most recent head f0eef4a. Consider uploading reports for the commit f0eef4a to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #364 +/- ## ======================================= Coverage 90.64% 90.64% ======================================= Files 29 29 Lines 951 951 ======================================= Hits 862 862 Misses 89 89 ```

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