Is your enhancement related to a problem? Please describe.
Once WordPress 5.6 is released, we'll want to test Safe Redirect Manager to see if any incompatibility issues arise.

Describe the solution you'd like

• test Safe Redirect Manager on WordPress 5.6

Describe the bug

A markdown file containing links to other files which have spaces in their names (example - Line 27).

This was previously reported under #48, but was closed as stale.

Steps to reproduce the behavior

1. Create a link to a markdown file with a space in it
2. Build
3. See that the link

Right now even contributors can see and create redirects. This might not be ideal so we should at least restrict it to those with publishing caps or even just to admins.

If we make it easy to change who has access via a filter or just documenting using the roles API then I think restricting to admins is the right call.