silent log level does not work

[Regev Brody]

The current logic of deciding if log level is enabled is by checking that the desired log level is lower than the set log level.
https://github.com/nuxt-contrib/consola/blob/28a61980aecbb41837b1dc81f87d6f6e76f7dcde/src/consola.js#L224
If we use infinity as the silent value, that will effectively cause all log levels to log.
We need to set silent log level to be -infinity