Compiling namada_sdk crate failed due to no "rand"

[yito88]

When building an application importing namada_sdk with v0.26.0,

error[E0599]: no function or associated item named `generate` found for struct `namada_core::types::key::ed25519::SigScheme` in the current scope
   --> /Users/yuji/.cargo/git/checkouts/namada-d9874c03bc334f5d/444da00/sdk/src/wallet/mod.rs:235:52
    |
235 |         SchemeType::Ed25519 => ed25519::SigScheme::generate(csprng).try_to_sk(),
    |                                                    ^^^^^^^^ function or associated item not found in `SigScheme`

error[E0599]: no function or associated item named `generate` found for struct `namada_core::types::key::secp256k1::SigScheme` in the current scope
   --> /Users/yuji/.cargo/git/checkouts/namada-d9874c03bc334f5d/444da00/sdk/src/wallet/mod.rs:237:35
    |
237 |             secp256k1::SigScheme::generate(csprng).try_to_sk()
    |                                   ^^^^^^^^ function or associated item not found in `SigScheme`

error[E0599]: no function or associated item named `generate` found for struct `namada_core::types::key::common::SigScheme` in the current scope
   --> /Users/yuji/.cargo/git/checkouts/namada-d9874c03bc334f5d/444da00/sdk/src/wallet/mod.rs:239:50
    |
239 |         SchemeType::Common => common::SigScheme::generate(csprng).try_to_sk(),
    |                                                  ^^^^^^^^ function or associated item not found in `SigScheme`

For more information about this error, try `rustc --explain E0599`.
error: could not compile `namada_sdk` (lib) due to 3 previous errors

generate requires rand in core.

namada/core/src/types/key/mod.rs

Lines 314 to 318 in e89a5a9

	/// Generate a keypair.
	#[cfg(feature = "rand")]
	fn generate<R>(csprng: &mut R) -> Self::SecretKey
	where
	R: CryptoRng + RngCore;

But rand isn't specified.

namada/sdk/Cargo.toml

Line 71 in 444da00

namada_core = {path = "../core", default-features = false}

[donglijack]

Bug