release 9.1

Use eight bytes for the geo ref (graphhopper#2978)

* Use eight bytes for the geo ref, graphhopper#500

* minor fix

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Co-authored-by: easbar <[email protected]>

matrix with status code in response

8.0 release - change readme

Show u-turn instruction for plain u-turns (graphhopper#2767)

Use GitHub Actions for Maven Central deployment too (graphhopper#2709)

* use github actions to deploy to maven central

* use private key directly to avoid escaping problems

* run only when tagged; renamed

* specify key id

* use more recent plugin versions

* different badge

* github actions: ignore tags

* include branches required

* include (2nd) test build to be sure

* ignoring tags is the default if branches is specified

* matches really all tags, https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet

* force test failure

* Revert "force test failure"

This reverts commit 85b38fe.

Upgrade dropwizard to 2.0.34 (graphhopper#2682)

* upgrade to dropwizard 2.0.32

* 2.0.34

Co-authored-by: Peter <[email protected]>
(cherry picked from commit 8163b09)

fix critical bug in client-hc for Matrix API

fix critical bug in client-hc for Matrix API

use 6.x/6.0 in readme