We should have the build fail if type coverage decreases (or drops below a manually-set threshold).
It is probably feasible to reach 100% type coverage eventually.
The reason for build failure should be easy for devs to discover, preferably on the index page of the failed Jenkins build
The failed build should direct developers to the uncovered lines and provide or point to information about how to run Flow locally.
We should generate a coverage report in the Jenkins build that is compatible with codecov so that we can see coverage information in codecov.
can Flow generate a report itself, or is an additional module needed (e.g. https://www.npmjs.com/package/flow-coverage-report)
can codecov handle both test and type coverage on the same files? If not, can we trick it into interpreting the flow coverage as applying to a separate directory tree?