Non-contract build error

[kroist]

As stated here,

drink/drink/test-macro/src/contract_building.rs

Line 32 in e493471

let metadata = MetadataCommand::new()

drink tries to build crate's contract, when the crate has ink-as-dependency feature.

The problem occurs, when the:

• Drink test crate is in the workspace
• Drink test crate does not have a contract inside
• Some other member of workspace has a contract (has ink-as-dependency feature)

cargo metadata returns the metadata for the workspace, not for the current crate.

Actually, it seems that the only workaround would be do exclude the drink test package from the workspace.

rust-lang/cargo#7754