fix tests, remove those not applicable to the GO version of biolink-api. fixes #17

[sierra-moxon]

Where applicable and failing, replace with succeeding versions of upstream biolink-API.
Add GitHub actions
Add working Dockerfile (with changes to support accessing the API via a docker container)

[sierra-moxon]

locally, the tests all pass:

50 scenarios passed, 0 failed, 0 skipped
196 steps passed, 0 failed, 0 skipped, 0 undefined
Took 0m20.250s```

[sierra-moxon]

https://github.com/geneontology/operations/issues/49

[sierra-moxon]

finally green! :) - I moved over to GitHub Actions for a few reasons:

1. it seems like GitHub would like folks to migrate (Travis was at some point threatening to retire, in favor of actions, though it hasn't happened yet).
2. actions are more common in the projects across BBOP.
3. requirements installation was much faster.