message: Update readme to include warning about using this package client-side
diff: ## Description
  -This package provides an API for the [GeoIP2 databases and GeoLite2
  -databases](https://dev.maxmind.com/geoip/docs/databases?lang=en), and an API
  -for the [GeoIP2 web services and GeoLite2 web
  +This package provides a server-side API for the [GeoIP2 databases and GeoLite2
  +databases](https://dev.maxmind.com/geoip/docs/databases?lang=en), and a server-side
  +API for the [GeoIP2 web services and GeoLite2 web
  services](https://dev.maxmind.com/geoip/docs/web-services?lang=en).
  +**This package will not work client-side.**
  +
  ## Installation
  ```sh
  