Cargo Features

dynamodb-book-ch20-bigtimedeals has no features set by default.

[dependencies]
dynamodb-book-ch20-bigtimedeals = { version = "0.3.0", features = ["once_cell"] }
once_cell

Enables once_cell, once_cell of modyne

dynamodb-book-ch20-bigtimedeals has 1 feature without comment.