release: cli v1.20.0 (#337)

This is a release PR for **cli** to version **1.20.0**.

Upon merging, this will automatically build the CLI and create a GitHub release. You still need to manually publish the cargo crate.

```
$ cd crates/cli
$ cargo publish
```

To merge this release, review the changes then say:

| bors r+ p=10 |
|:-:|

CITATION.cff

@@ -5,8 +5,8 @@ message: |
   If you use this software, please cite it using these metadata.
 
 title: Watchexec
-version: "1.19.0"
-date-released: 2022-04-15
+version: "1.20.0"
+date-released: 2022-06-23
 
 repository-code: https://github.com/watchexec/watchexec
 license: Apache-2.0

crates/cli/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "watchexec-cli"
-version = "1.19.0"
+version = "1.20.0"
 
 authors = ["Matt Green <mattgreenrocks@gmail.com>", "Félix Saparelli <felix@passcod.name>"]
 license = "Apache-2.0"

crates/cli/tests/snapshots/help__help_unix.snap

@@ -2,7 +2,7 @@
 source: crates/cli/tests/help.rs
 expression: "String::from_utf8(output.stdout).unwrap()"
 ---
-watchexec 1.19.0
+watchexec 1.20.0
 Execute commands when watched files change
 
 USAGE:

crates/cli/tests/snapshots/help__help_windows.snap

@@ -3,7 +3,7 @@ source: cli/tests/help.rs
 assertion_line: 16
 expression: "String::from_utf8(output.stdout).unwrap()"
 ---
-watchexec 1.19.0
+watchexec 1.20.0
 Execute commands when watched files change
 
 USAGE:

crates/cli/watchexec.exe.manifest

@@ -3,7 +3,7 @@
 	<assemblyIdentity
 		type="win32"
 		name="Watchexec.Cli.watchexec"
-		version="1.19.0.0"
+		version="1.20.0.0"
 	/>
 
 	<trustInfo>