Bump crossterm from 0.20.0 to 0.21.0

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>

Cargo.lock

@@ -213,6 +213,22 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "crossterm"
+version = "0.21.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "486d44227f71a1ef39554c0dc47e44b9f4139927c75043312690c3f476d1d788"
+dependencies = [
+ "bitflags",
+ "crossterm_winapi",
+ "libc",
+ "mio",
+ "parking_lot",
+ "signal-hook",
+ "signal-hook-mio",
+ "winapi",
+]
+
 [[package]]
 name = "crossterm_winapi"
 version = "0.8.0"
@@ -418,7 +434,7 @@ dependencies = [
  "clap",
  "clap_generate",
  "crossbeam-queue",
- "crossterm",
+ "crossterm 0.21.0",
  "dirs-next",
  "expand",
  "futures-lite",
@@ -691,7 +707,7 @@ checksum = "39c8ce4e27049eed97cfa363a5048b09d995e209994634a0efc26a14ab6c0c23"
 dependencies = [
  "bitflags",
  "cassowary",
- "crossterm",
+ "crossterm 0.20.0",
  "serde",
  "unicode-segmentation",
  "unicode-width",

Cargo.toml

@@ -17,7 +17,7 @@ async-io = "1.6.0"
 async-net = "1.6.1"
 clap = "3.0.0-beta.4"
 crossbeam-queue = "0.3.2"
-crossterm = "0.20.0"
+crossterm = "0.21.0"
 dirs-next = "2.0.0"
 expand = "0.2.0"
 futures-lite = "1.12.0"