3.0.0

What changed:

• Migrate toolkit by @Daedaluz in #18
• implement variable expansion in queries by @Daedaluz in #20
• implement oauth2 passthrough by @Daedaluz in #19
• change the health-check OK status message by @Daedaluz in #21
• Minimum working version by @Daedaluz in #24

Full Changelog: 2.2.2...3.0.0

Breaking changes

This release changes how API-Keys are stored, after installation all data-sources need to be resaved to migrate their keys.