Update to work with newer curve25519-dalek?

[ageis]

Problems:

$  cargo update
    Updating crates.io index
error: failed to select a version for the requirement `curve25519-dalek = "^0.14"`
  candidate versions found which didn't match: 1.2.1, 1.1.4, 1.1.3, ...
  location searched: crates.io index
required by package `zcash-vanity v0.2.8 (/home/kevin/dev/zcash-vanity)`


$ cargo install zcash-vanity
    Updating crates.io index
  Installing zcash-vanity v0.2.8
error: failed to compile `zcash-vanity v0.2.8`, intermediate artifacts can be found at `/tmp/cargo-installxvhSbz`

Caused by:
  failed to select a version for the requirement `curve25519-dalek = "~0.9.2"`
  candidate versions found which didn't match: 1.2.1, 1.1.4, 1.1.3, ...
  location searched: crates.io index
required by package `zcash-vanity v0.2.8`

Compiling with the current version 1.2.1 of curve25519-dalek after modifying Cargo.toml:

warning: unknown lint: `unreadable_literal`
 --> src/sha256.rs:4:9
  |
4 | #[allow(unreadable_literal)]
  |         ^^^^^^^^^^^^^^^^^^
  |
  = note: #[warn(unknown_lints)] on by default

error[E0599]: no method named `compress` found for type `curve25519_dalek::montgomery::MontgomeryPoint` in the current scope
  --> src/address.rs:87:41
   |
87 |         let pk_enc = pk.to_montgomery().compress().to_bytes();
   |                                         ^^^^^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0599`.
error: Could not compile `zcash-vanity`.

[mmgen]

Can confirm: the utility fails to compile. Over two years have passed and this issue is still unresolved.

[mmgen]

Thank you! Built and installed successfully.