Bump crossterm from 0.20.0 to 0.21.0 (#612)

Bumps [crossterm](https://github.com/crossterm-rs/crossterm) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/crossterm-rs/crossterm/releases)
- [Changelog](https://github.com/crossterm-rs/crossterm/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossterm-rs/crossterm/commits)

---
updated-dependencies:
- dependency-name: crossterm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -122,9 +122,9 @@ dependencies = [
 
 [[package]]
 name = "crossterm"
-version = "0.20.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0ebde6a9dd5e331cd6c6f48253254d117642c31653baa475e394657c59c1f7d"
+checksum = "486d44227f71a1ef39554c0dc47e44b9f4139927c75043312690c3f476d1d788"
 dependencies = [
  "bitflags",
  "crossterm_winapi",

Cargo.toml

@@ -17,7 +17,7 @@ travis-ci = { repository = "denisidoro/navi", branch = "master" }
 [dependencies]
 regex = { version = "1.5.4", default-features = false, features = ["std", "unicode-perl"] }
 clap = "3.0.0-beta.2"
-crossterm = "0.20.0"
+crossterm = "0.21.0"
 lazy_static = "1.4.0"
 directories-next = "2.0.0"
 walkdir = "2.3.1"