Make some more examples with free APIs

[hadley]

https://www.freepublicapis.com/tags/all

[jrosell]

@hadley I can try make a PR. What idea do you have? What should be tested? On what example can I get inspiration?

[hadley]

@jrosell I don't really have any concrete ideas yet sorry. This is mostly just a note to self so I don't forget about that site.

[jrosell]

Ok. If you want, I can make a PR adding an example looking up latitude and longitude of an address to then look up its air quality.