Andreas Jaeger f037523797 Update hacking for Python3
The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found by updated hacking version.

Remove hacking and friends from lower-constraints, they are not needed
for co-installing.

Change-Id: Ibef3bbaceb61612d678c542bc8c95da24a7e2c87
2020-04-01 12:22:43 +00:00
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