PGAPPNAME environment variable causes permission error in Deno even when appname is passed in options

[Jobians]

When using postgresjs in Deno without the --allow-env flag, I get this error:

NotCapable: Requires env access to "PGAPPNAME", run again with the --allow-env flag

This happens even though I pass the appname or application_name option explicitly in the connection parameters.

It seems the library reads the PGAPPNAME environment variable before applying the connection options, forcing Deno to require --allow-env permission.

[Jobians]

Fixed: #1079