v1.2.0

[stolarczyk]

Supports PEP2.0.0 and new pipeline interface format

wait for:

• [x] https://github.com/pepkit/example_peps/pull/5
• [x] https://github.com/pepkit/ubiquerg/pull/27
• [x] https://github.com/pepkit/divvy/pull/48
• [x] https://github.com/pepkit/peppy/pull/346
• [x] https://github.com/pepkit/eido/pull/17

todo:

• [x] #258
• [x] https://github.com/pepkit/looper/issues/254
• [x] version bump; see https://github.com/pepkit/looper/issues/227
• [x] update changelog
• [x] tests
• [x] https://github.com/pepkit/looper/issues/248
• [x] update ubiquerg minimum requirement (probably also for eido/peppy/divvy... others?)
• [x] work on https://github.com/pepkit/looper/blob/dev/docs/writing-a-pipeline-interface.md
• [x] update travis to point at release versions of eido/peppy/divvy after they are released.

[stolarczyk]

@jpsmith5 I'm done with #245 and #253, so no more changes to the CLI -- you can work on the summarizer tweaks

[jpsmith5]

👍