Adds OpenTargets as From/To database

[hlfernandez]

The OpenTargets is now available and listed in the valid databases list (https://rest.uniprot.org/configure/idmapping/fields).

[multimeric]

This probably isn't clear from the file itself, but unipressed/id_mapping/types.py is auto-generated via codegen/id_mapping/generate.py. That needs to be re-run to ensure that there aren't any other databases that have been missed. I'm happy if you do that for this PR though.

[hlfernandez]

Sure, I'll update the file using the generate.py script. Sorry for the inconvenience, I didn't notice that.

[hlfernandez]

@multimeric I have just run the generate.py script and updated the file. OpenTargets was the only addition but it was added in a different position so I have updated the file, amended the commit and made a push --force. Please, review the pull request and tell me if I should do anything else.

[multimeric]

That's good! It's better this way because it would pass the automated CI codegen build once I implement that. I'll fix the CI issues in a separate PR before I merge this.

[multimeric]

Okay, I've fixed the tests. Can you please pull from master and then this should be good to merge.

[hlfernandez]

Okay, I've fixed the tests. Can you please pull from master and then this should be good to merge.

Done!