Bump dialoguer dependency to v0.8.0

Bump the dependency of 'dialoguer' to v0.8.0, because the previous
version depended on a yanked version of the 'zeroize' crate. This threw
the following error:

    error: failed to select a version for the requirement `zeroize = "^0.9.3"`
    Error: candidate versions found which didn't match: 1.3.0, 1.2.0, 1.1.1, ...
    location searched: crates.io index
    required by package `dialoguer v0.7.0`
        ... which is depended on by `tindercrypt v0.3.0 (/home/runner/work/tindercrypt/tindercrypt)`
    Error: The process '/usr/share/rust/.cargo/bin/cargo' failed with exit code 101

Author: apyrgio

CHANGELOG.md

@@ -17,6 +17,10 @@ Versioning].
   * https://github.com/stepancheg/rust-protobuf/issues/551
   * https://github.com/rust-lang/rust/issues/64266
 
+### Changed
+
+- Bump the dialoguer dependency to v0.8.0, to fix a compilation error.
+
 ## [0.3.0] - 2021-01-11
 
 ### Added

Cargo.toml

@@ -34,7 +34,7 @@ zeroize = "1"
 # https://github.com/rust-lang/cargo/issues/1982, for the current state of
 # binary-only dependencies in `cargo`.
 clap = { version = "2", optional = true }
-dialoguer = { version = "0.7", optional = true }
+dialoguer = { version = "0.8", optional = true }
 lazy_static = { version = "1", optional = true }
 
 [dev-dependencies]