missing pycodestyle dependency

Encountered issue while using template:

make test-debug
...
pycodestyle tests
make: pycodestyle: No such file or directory
make: *** [Makefile:40: test-debug] Error 127
...

pycodestyle used in makefile, but not specified as a dependency.

https://github.com/userver-framework/service_template/blob/a84cf8a3b0f2c56ad6f03931ac47290d8ead1a40/Makefile#L40