Fix for ORCID and ROR identifiers ending with a `/` not being rendered in JSON when converting from XML

[codycooperross]

Purpose

Fix for ORCID and ROR identifiers ending with a / not being rendered in JSON when converting from XML.

closes: #188

Approach

Permits trailing slashes in validate_orcid and validate_ror methods.

Open Questions and Pre-Merge TODOs

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Types of changes

• [x] 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 change)

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