Update install instructions to use npx (#1355)
Update install instructions to use npx (#1355)

* Update install instructions to use npx

This change recommends using npx to avoid global installs of `preact-cli`

Related discussions: https://github.com/preactjs/preact-cli/pull/1343 and https://github.com/preactjs/preact-cli/issues/1342

* Update README.md

Co-authored-by: Ryan Christian <c5c87215edf343d3694fcefc309913c662893dfc@users.noreply.github.com>

* Fix package name

Co-authored-by: Ryan Christian <c5c87215edf343d3694fcefc309913c662893dfc@users.noreply.github.com>
developit/preact-cli,developit/preact-cli