psycopg2 breaks installation because it requires the binaries

[ogabrielluiz]

Describe the bug psycopg2dependency requires binaries and breaks installation or upgrades to version 0.0.56

To Reproduce Steps to reproduce the behavior:

1. run pip install langflow==0.0.56

Additional context stdout:

pg_config is required to build psycopg2 from source.  Please add the directory
  containing pg_config to the $PATH or specify the full executable path with the
  option:

      python setup.py build_ext --pg-config /path/to/pg_config build ...

  or with the pg_config option in 'setup.cfg'.

  If you prefer to avoid building psycopg2 from source, please install the PyPI
  'psycopg2-binary' package instead.

  For further information please check the 'doc/src/install.rst' file (also at
  <https://www.psycopg.org/docs/install.html>).

[oliver-li]

Describe the bug psycopg2dependency requires binaries and breaks installation or upgrades to version 0.0.56

To Reproduce Steps to reproduce the behavior:

1. run pip install langflow==0.0.56

Additional context stdout:

pg_config is required to build psycopg2 from source.  Please add the directory
  containing pg_config to the $PATH or specify the full executable path with the
  option:

      python setup.py build_ext --pg-config /path/to/pg_config build ...

  or with the pg_config option in 'setup.cfg'.

  If you prefer to avoid building psycopg2 from source, please install the PyPI
  'psycopg2-binary' package instead.

  For further information please check the 'doc/src/install.rst' file (also at
  <https://www.psycopg.org/docs/install.html>).

I submitted a PR last night regarding the update of psycopg2 error. I noticed that the new version changed from psycopg2 to psycopg2-binary. I resolved the installation error caused by installing psycopg2. For local deployment on Mac, you need to install 'brew install postgresql'; for Linux, you need 'pip3 install python3-psycopg2'.