Updated splunk python SDK from 2.0.2 to 2.1.0 as per Splunk cloud com…

…patibility requirements

Merge branch 'main' of github.com:gjanders/decrypt2 into main

README update based on an issue resolved by an email exchange

Update app.conf

Increment build number

Updated README.md file

updates to README.md

Delete app.manifest

Merged pull request from Steven (malvidin on github)

This new version includes the app.conf/README.md updates related to the fix:
- A fix to base58 to deal with empty input
- A setting for slice length and max length on base58

Merged pull request from Steven (malvidin on github)

This new version includes:
- New base58 decode function (b58)
- Updated python SDK to 1.7.2

Merged pull request from Steven (malvidin on github)

When Splunk sends a CSV that contains null bytes to Python 3.7, the CSV Reader error is not helpful
This update provides a warning to advise of the null character in the data (sed/rex/eval/replace can be used to remove the NUL character)