BUG: default label types

[jklenzing]

Description

A number of metadata values are dropped where the type is not a float. This updates the standards so that both int and float are accepted by default. See https://github.com/pysat/pysat/pull/1108

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Tested by running tests with both pysat main and https://github.com/pysat/pysat/pull/1108 and inspecting warning messages.

Test Configuration

• Operating system: Monterrey
• Version number: Python 3.9.7

Checklist:

• [x] Make sure you are merging into the develop (not main) branch
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules
• [x] Add a note to CHANGELOG.md, summarizing the changes
• [x] Update zenodo.json file for new code contributors