Remove reference to "min" config option (#126)

Because it no longer exists.

Author: jbaudanza

README.md

@@ -32,7 +32,6 @@ var pool2 = new Pool({
   port: 5432,
   ssl: true,
   max: 20, // set pool max size to 20
-  min: 4, // set min pool size to 4
   idleTimeoutMillis: 1000, // close idle clients after 1 second
   connectionTimeoutMillis: 1000, // return an error after 1 second if connection could not be established
 })