Fix and update tests with the BioLink v2.1 changes

[newgene]

As part of this parent issue: biothings/biothings_explorer#207, we should fix and update the tests corresponding with the updates to BioLink v2.1.

[newgene]

main branch - all tests pass
biolinkv2.1.0-updates-only - currently 4 failed tests:

Test Suites: 2 failed, 8 passed, 10 total
Tests:       4 failed, 2 skipped, 101 passed, 107 total

@colleenXu please help add expected BioLink v2.1 compatible (entity names) tests as well.

[colleenXu]

@newgene please check the new branch biolink_v2.1 since that branch has been deleted.

[newgene]

I reran the tests using the latest biolink_v2.1 branch, all tests pass now:

npm run git checkout "biolink_v2.1"
npm run compile
npm run test --workspace=biomedical_id_resolver

Test Suites: 10 passed, 10 total
Tests:       107 passed, 107 total
Snapshots:   0 total
Time:        32.605 s