v1.0.0-alpha.2: Second alpha release for 1.0.0

• Nushell has been pinned to 0.32.0 for the next release.
• fixed the history (now in the .cbsh dir as a history.txt file)
• the linux builder has been switched from ubuntu 20.04 to 18.04 to be more conservative and target more linux users
• renamed [[clusters]] to [[cluster]], but kept the old style too for backwards compatibility
• fix disabling tls in the config (property is now correctly called tls-enabled)
• Added examples to: doc get
• handle config syntax errors gracefully and log them nicely on startup
• Added the analytics links command
• Added the analytics buckets command
• Added the analytics pending-mutations command
• Support registering / unregistering clusters on the fly
• Added new [[cloud]] config to support couchbase cloud
• Supports getting, creating, updating and dropping buckets from couchbase cloud