meltano add loader target-postgres

----------------------------------------
  Running setup.py clean for backoff
  Running setup.py bdist_wheel for simplejson: started
  Running setup.py bdist_wheel for simplejson: finished with status 'error'
  Complete output from command /home/mettle/projects/tap-postgres/.meltano/loaders/target-postgres/venv/bin/python3 -u -c "import setuptools, tokenize;_file_='/tmp/pip-build-4f3g_cbr/simplejson/setup.py';f=getattr(tokenize, 'open', open)(_file_);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, _file_, 'exec'))" bdist_wheel -d /tmp/tmp_59t7mkzpip-wheel- --python-tag cp36:
  usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
     or: -c --help [cmd1 cmd2 ...]
     or: -c --help-commands
     or: -c cmd --help
  
  error: invalid command 'bdist_wheel'
$ meltano --version
meltano, version 1.11.0