fix(package): reference the correct path for the built package
fix(package): reference the correct path for the built package

Fixes #264

eventualbuddha/decaffeinate,alangpierce/decaffeinate,eventualbuddha/decaffeinate,alangpierce/decaffeinate,decaffeinate/decaffeinate,alangpierce/decaffeinate,decaffeinate/decaffeinate