AttributeError: module 'singer.metadata' has no attribute 'get_standard_metadata'

[owaismultani]

Machine - Ubuntu 20.04 LTS
python version - 3.8

ran the following commands.
pip install tap-google-sheets
tap-google-sheets --config config.json --discover > catalog.json

the config.json contains the following:

{
"refresh_token":"---------",
"client_id":"----------",
"client_secret":"-------------",
"user_agent": "tap-google-sheets (via singer.io)",
"start_date": "2019-01-01T00:00:00Z",
"spreadsheet_id": "--------------",
"range": "A2:E2"
}

INFO Authorized, token expires = 2020-08-20 14:57:22.412650
INFO Starting discover
CRITICAL module 'singer.metadata' has no attribute 'get_standard_metadata'
Traceback (most recent call last):
  File "/home/owais/anaconda3/envs/singer5/bin/tap-google-sheets", line 8, in <module>
    sys.exit(main())
  File "/home/owais/anaconda3/envs/singer5/lib/python3.8/site-packages/singer/utils.py", line 225, in wrapped
    return fnc(*args, **kwargs)
  File "/home/owais/anaconda3/envs/singer5/lib/python3.8/site-packages/tap_google_sheets/__init__.py", line 49, in main
    do_discover(client, spreadsheet_id)
  File "/home/owais/anaconda3/envs/singer5/lib/python3.8/site-packages/tap_google_sheets/__init__.py", line 26, in do_discover
    catalog = discover(client, spreadsheet_id)
  File "/home/owais/anaconda3/envs/singer5/lib/python3.8/site-packages/tap_google_sheets/discover.py", line 6, in discover
    schemas, field_metadata = get_schemas(client, spreadsheet_id)
  File "/home/owais/anaconda3/envs/singer5/lib/python3.8/site-packages/tap_google_sheets/schema.py", line 269, in get_schemas
    mdata = metadata.get_standard_metadata(
AttributeError: module 'singer.metadata' has no attribute 'get_standard_metadata'