DoH: fallback to GET if a 405 HTTP status code is returned

Some servers block POST queries. Retry with GET if we receive a
405 HTTP status code.

feat: Add shell completions for zsh,fish

chore: add URL to README

fix: custom line-height for headers

fix: line-height for responsive screens

feat: jazz up form ui

feat: Add autofocus to input

fix: bg css for inputs

fix: goreleaser build

add version