dbt-language-server dumps non-LSP content to stdio

[egh]

Hi,

When using with emacs & emacs-lsp-booster, I encountered a problem with the stdio output.

Steps to reproduce:

1. Use google bigquery with dbt
2. Start dbt-language-server --stdio

Expected result:

1. Only lsp allowed content on stdout

Actual result:

1. zetasql-snowflake outputs this content

Running server on localhost:40109...
Server listening on localhost:40109

to stdout.

See the related bug here: blahgeek/emacs-lsp-booster#22

Thank you for any help you can provide!