Merge tag '0.1.2' into dev

v0.1.2 hotfix release
 * reverts [form-serialize](https://github.com/dominicbarnes/form-serialize) temporarilly (to address regression)
 * properly handles the `transformer` param for `Form#serialize()`
updating form-serialize dependency (going to bump the minor version this time)
adding smoke test for square-bracket notation support
version bump + changelog update
Merge branch 'release/0.2.0'