[ELPA] New package: vertico

[Daniel Mendler]

Dear ELPA maintainers,

I want to submit the package "vertico" to ELPA. The package provides a 
minimalistic vertical interactive completion system, comparable to Ivy, 
Icomplete-vertical or Selectrum. Vertico adheres to the default 
completing-read API and is fully compliant with all Emacs completion 
tables, including dynamic completion tables.

The Vertico source and a README can be found at 
https://github.com/minad/vertico.

Thank you!

Daniel Mendler