dwollav2 TypeError: request() got an unexpected keyword argument 'file' on document upload (1.5.0)
## The problem
Uploading a document with dwollav2 1.5.0 failed with `TypeError: request() got an unexpected keyword argument 'file'` raised from inside token.py's post(). A community member traced it to params being passed positionally instead of as the named `params` kwarg, so requests received them twice. A maintainer confirmed the regression was introduced in v1.4.0.
## What fixed it
Regression in v1.4.0/v1.5.0: `post()`/`get()` in token.py passed params positionally, breaking any call with extra kwargs like document upload. Workaround confirmed by the maintainer: pin to v1.3.0 in production. The fix shipped and the maintainer confirmed anything >= 1.6.0 has it — upgrade to 1.6.0+.