Merge pull request circleci#55 from circleci/BACKPLANE-1080/pulish-tag

ci: Add tag filter to test

bump 0.4.0

Bump version to 0.3.2

Differences from 0.3.1 -> 0.3.2:

- `with-stub!` now produces more useful errors when attempting to stub
  function with no `:arglists` in their metadata. (circleci#43)
- Updates to the README (circleci#40, circleci#42)