• Fix subscriptions never unsubscribing after the id swap in 1.18.1 (Thanks to https://github.com/dillu24 for testing iterations)
• Add support for CheckMortality signed extension (old CheckEra is now an alias)
• Promise API will default to using getStorage on non-subscription calls, reducing RPC overhead
• Optimize derive BN allocations, using in-place operators as applicable
• Add new substrate types for Babe EquivocationProof
• Adjust Releases enum to use a shared instance