Update Marketplace Precompile ABI

[JasonTulp]

This PR addresses a few small inconsistencies picked up when testing the marketplace precompile.

• Update ABI with consistent camelCase + fix compiler errors
• Change duration to None if input is 0 (Otherwise this will start and end the listing in the same block, but not clear it)
• Change marketplaceId to None if input is 0 (Otherwise the tx will fail due to no marketplace for id 0)

This also fixes a minor bug in the marketplace pallet that allowed listings to be created with Some(0) duration, this would result in the listing never being cleared automatically

[KarishmaBothara]

lgtm... Thanks for updating the interface... looks great