Basically all of the `actions-rs/*` actions are unmaintained. See
<https://github.com/actions-rs/toolchain/issues/216> for more
information. Due to their age they generate several warnings in
CI runs.
To get rid of some of those warnings the occurrences of
`actions-rs/toolchain` are replaced by `dtolnay/rust-toolchain`,
and the occurrences of `actions-rs/cargo` are replaced by direct
invocations of `cargo`.
The previous approach complicates supporting ECDSA with `FieldSize`
which is different from `C::Uint::ByteSize`.
The new implementation eliminates `crypto-bigint` as a dependency and
makes the API entirely byte-oriented.
This is a simpler approach which also eliminates some previous trait
bounds on the generic ECDSA implementation.
Reverts the changes from #433 that split the `ed25519` crate out into
its own namespace.
Instead, temporarily disables the `ring-compat` dependency and doctests
in the `ed25519` crate until it's updated to the latest version of the
`signature` crate.
Fixes#440
The `elliptic-curve` crate as well as format parsers including `der`,
`sec1`, and `pkcs8` have all been bumped to the 2021 edition:
https://github.com/RustCrypto/traits/pull/795
This commit updates the `ecdsa` crate to the 2021 edition accordingly.
Tony Arcieri