Pipreqs gets wrong version of (builtin) dataclasses

When running pipreqs to create a requirements.txt on Ubuntu with python 3.8 pipreqs adds the entry

> dataclasses=0.7

After trying to install the requirements.txt it will recieve the following error:

> ERROR: Could not find a version that satisfies the requirement dataclasses==0.7 (from -r requirements.txt (line 12)) (from versions: 0.1, 0.2, 0.3, 0.4, 0.5, 0.6)

Dataclasses is a builtin since python 3.7 and the new version 0.7 only runs on python 3.6.