v2.1.0

AbstractMCMC v2.1.0

Diff since v2.0.0

Merged pull requests:

• Add documentation to README (#43) (@devmotion)
• Add chainsstack (#45) (@devmotion)
• Provide generic implementation of bundle_samples for Vector{T} (#46) (@devmotion)
• Add discard_initial keyword argument (#47) (@devmotion)
• Update CompatHelper and TagBot (#48) (@devmotion)