Release version 3.1.0

Merge pull request #12 from BDSU/instagram-basic-display-api

Update to Instagram Basic Display API

Update base package version

Add support for custom host configuration

Add improved exception handling

Update changelog

update dependency on league/[email protected]

Merge pull request #3 from thephpleague/scope-separator

using abstract provider scope separator to format scopes

Merge pull request #2 from thephpleague/scope-separator

Improved clarity around expectation of managing scopes

Update README.md