v0.3.2

This is a patch release from v0.3.1 → v0.3.2.

Changes:
  - feat: change qmu API and remove test_stat return (#712)
  - fix: Correct order of Codecov reporting in CI (#711)
  - feat: Add contrib module (#694)
  - refactor: Use MLE API (#690)
  - ci: workflow that runs bumpversion and pushes when issue filed (#650)
  - feat: double precision for ML backends (#701)
  - docs: Add docstrings for interpolators (#702)
  - docs: Add Altair example notebook (#699)
  - docs: Add docstrings for src/pyhf/infer (#698)
  - feat: Add ENTRYPOINT to pyhf Docker image (#700)
  - ci: Use Python 3 scipy Alpine image for base Docker image (#697)
  - ci: Add Codecov threshold tolerance (#693)
  - chore: Remove top level 'examples' dir (#688)