Add changelog casting optionals to str according to schema

[nvdaes]

• Add changelog
• Add changelog to json schema
• Address code review
• Update _validate/addonVersion_schema.json
• Apply suggestions from code review
• Address review
• Address review
• Assign None to changelog when appropriate
• Pre-commit auto-fix
• Fix
• Fix
• Remove unassigned addonData
• Fix test
• Fix error message
• harmonize test for changelog with homepage
• Fix test
• Remove function
• Commend python preference to test locally
• Lint fixes
• Add translated changelog optional and fix linting errors by casting to str
• Fix pyproject
• Add ignore type comments
• Add ignore type comment
• Address review
• Address review
• Remove accidentally committed files
• Try to ensure that homepage and changelog are str or None
• Address feedback
• Apply suggestions from code review
• Apply suggestions from code review
• Apply suggestions from code review
• Update _validate/createJson.py
• Apply review suggestions
• Update createJson casting fields to str according to schema

[nvdaes]

@seanbudd , I'll test with this. I think we should cast optionals to str according to json schema to create the json file, since a string is expected, not None.

[seanbudd]

@nvdaes - please keep this as None and avoiding casting to strings as requested in #48 (comment)

We should be able to handle None values safely

[nvdaes]

Sean wrote:

We should be able to handle None values safely

I've added the null type to some properties. I wonder if we should make the description optional, and in this case, if it should be a required field in the json schema and translations. I'll wait for your feedback before moving forward.