message: Update alternatives
  `rust-gmp`, `ramp`, and `apint` are all unmaintained
diff: @@ -50,20 +50,22 @@ While `num-bigint` strives for good performance in pure Rust code, other
  crates may offer better performance with different trade-offs. The following
  table offers a brief comparison to a few alternatives.
  -| Crate | License | Min rustc | Implementation |
  -| :--------------- | :------------- | :-------- | :------------- |
  -| **`num-bigint`** | MIT/Apache-2.0 | 1.31 | pure rust |
  -| [`ramp`] | Apache-2.0 | nightly | rust and inline assembly (no longer maintained) |
  -| [`rug`] | LGPL-3.0+ | 1.37 | bundles [GMP] via [`gmp-mpfr-sys`] |
  -| [`rust-gmp`] | MIT | stable? | links to [GMP] |
  -| [`apint`] | MIT/Apache-2.0 | 1.26 | pure rust (unfinished) |
  +| Crate | License | Min rustc | Implementation | Features |
  +| :--------------- | :------------- | :-------- | :------------- | :------- |
  +| **`num-bigint`** | MIT/Apache-2.0 | 1.31 | pure rust | dynamic width, number theoretical functions |
  +| [`rug`] | LGPL-3.0+ | 1.37 | bundles [GMP] via [`gmp-mpfr-sys`] | all the features of GMP, MPFR, and MPC |
  +| [`awint`] | MIT/Apache-2.0 | 1.61 | pure rust | fixed width, heap or stack, concatenation macros |
  +| [`bnum`] | MIT/Apache-2.0 | 1.61 | pure rust | fixed width, parity with Rust primitives including floats |
  +| [`ibig`] | MIT/Apache-2.0 | 1.49 | pure rust | dynamic width, number theoretical functions |
  +| [`crypto-bigint`] | MIT/Apache-2.0 | 1.57 | pure rust | fixed width, stack only |
  [GMP]: https://gmplib.org/
  [`gmp-mpfr-sys`]: https://crates.io/crates/gmp-mpfr-sys
  [`rug`]: https://crates.io/crates/rug
  -[`rust-gmp`]: https://crates.io/crates/rust-gmp
  -[`ramp`]: https://crates.io/crates/ramp
  -[`apint`]: https://crates.io/crates/apint
  +[`awint`]: https://crates.io/crates/awint
  +[`bnum`]: https://crates.io/crates/bnum
  +[`ibig`]: https://github.com/tczajka/ibig-rs
  +[`crypto-bigint`]: https://crates.io/crates/crypto-bigint
  ## License
  