“Deprecated: mysql_connect()” error when installing Roots Bedrock

It’s not a Bedrock issue, but an issue with your local install.

Your local install probably uses the old php_mysql extension, instead of the modern php_mysqli.

You should probable update your local environment.

This is where the change landed in WordPress codebase (17 months ago)

https://core.trac.wordpress.org/changeset/27935

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)