Open VSX v0.9.6

This is the ninth release of Open VSX. It consists of

• ovsx CLI
• openvsx-webui frontend library
• openvsx-server Docker image
• openvsx-webui Docker image

Deploying the server application is documented in the Wiki.

What's Changed

• add set up guide for MacOS by @yiningwang11 in #671
• Need to deal with collisions when renaming and merging namespaces by @amvanbaren in #717

Full Changelog: v0.9.5...v0.9.6