Changes to the API

[malcolmbarrett]

I received an email this morning from Meetup about changing their API from key-based to OAuth-based on August 15, 2019. It looks like a substantial change that may affect the package: https://www.meetup.com/meetup_api/auth/?utm_medium=email&utm_source=transactional&utm_campaign=api_update&utm_content=en_06142019#oauth2

It also appears that OAuth accounts are free until August 15 but will require a pro account after that :/

[malcolmbarrett]

@ledell just posted this to #51 so I'm going to close this

[ledell]

Thanks @malcolmbarrett.