v7.0.0

Release run: #20

Updating to Panda v7

See #160 for a full guide on upgrading a project from Panda v4 to v7.

Updated requirements

• Java 11 (see also guardian/maintaining-scala-projects#3)

What's Changed

• Support accepting multiple public keys by @rtyley in #150 (re-merged as #156)

Full Changelog: v6.0.0...v7.0.0