Updated version

Release 8.11.1

Merge pull request mermaid-js#2164 from mermaid-js/dependabot/github_…

…actions/develop/actions/setup-node-2.2.0

Bump actions/setup-node from 1 to 2.2.0

Merge branch 'release/8.11.0'

Version update to 8.11.0

Merge pull request mermaid-js#2115 from mermaid-js/2111_placeholder

2111 placeholder

Removed some console statememnts and updated version

Merge branch 'release/8.9.3'

Updated tests

Merge pull request mermaid-js#1943 from simon-id/patch-1

Fix typo in usage.md