Riffle 0.0.6

Asynchronous Unlock

Because Cursor.unlock is asynchronous in Strata, unlock needs to be asynchronous here in Skip so that it can invoke the asynchronous Cursor.unlock.

Issue by Issue

• Release version 0.0.6. #35.
• Upgrade Strata to 0.0.19. #45. #44.
• Upgrade Proof to 0.0.45. #40.
• Upgrade Cadence to 0.0.38. #33. #41. #36.
• Do not use Cadence exposed by Proof. #42.
• Remove "url" from package.json. #38.
• Remove this.terminated. #34.