Censor non-string elements

[nwithan8]

Description

• Allow non-string values for censor elements (compare string-string via conversions)

Closes #76

Testing

• Add unit tests to test three times of censor elements with non-string values, via body content

Pull Request Type

Please select the option(s) that are relevant to this PR.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement (fixing a typo, updating readme, renaming a variable name, etc)

[nwithan8]

Unit tests have been modified, rather than hitting like Reddit JSON and XML feeds, use snapshots of the r/ProgrammerHumor JSON and RSS feeds stored in this repo. #78 will need to be merged first for the unit tests to pass.