lightning-invoice create cannot be used with `no-std`, `serde`, and `default-features = false`

[benthecarman]

When compiling I get this error
cargo check --features no-std --features serde --no-default-features

error: cannot find macro `format` in this scope
    --> lightning-invoice/src/lib.rs:1651:34
     |
1651 |             .map_err(|e| D::Error::custom(format!("{:?}", e)))?;
     |                                           ^^^^^^
     |
     = help: consider importing this macro:
             alloc::format

error: could not compile `lightning-invoice` (lib) due to previous error