add a Nushell version update script and bump all versions to 0.81.0 (…

…#21)

* add a little script to update the Nushell version at once

* EXAMPLE: downgrade to 0.80.0

Command run:
```nu
./scripts/update-nushell-version 0.80.0
```

* update the version of Nushell to `0.81.0`

Command run:
```nu
./scripts/update-nushell-version 0.81.0
```

Sample output:
```nu
2023-06-08T19:56:25.197|INF|updating the badge in the README
2023-06-08T19:56:25.202|INF|updating the `nu-parser` dependency
    Updating crates.io index
      Adding nu-parser v0.81.0 to dependencies.
             Features:
             - nu-plugin
             - plugin
2023-06-08T19:56:26.312|INF|updating the `nu-protocol` dependency
    Updating crates.io index
      Adding nu-protocol v0.81.0 to dependencies.
             Features:
             - plugin
             - serde_json
2023-06-08T19:56:26.815|WRN|do not forget to commit and push this :wink:
```

Cargo.toml

@@ -18,8 +18,8 @@ anyhow = "1.0.71"
 clap = { version = "4.3.0", optional = true, features = ["unicode", "derive"] }
 env_logger = "0.10.0"
 log = "0.4.17"
-nu-parser = "0.80.0"
-nu-protocol = "0.80.0"
+nu-parser = "0.81.0"
+nu-protocol = "0.81.0"
 
 [dev-dependencies]
 criterion = "0.5.1"

scripts/update-nushell-version

@@ -0,0 +1,19 @@
+#!/usr/bin/env nu
+
+use std log
+
+def main [
+ version: string # the new version of Nushell, e.g. 0.82.0
+] {
+ log info "updating the badge in the README"
+ open README.md
+ | str replace 'https://img.shields.io/badge/nushell-v\d+\.\d+\.\d+-green' $"https://img.shields.io/badge/nushell-v($version)-green"
+ | save --force README.md
+
+ log info "updating the `nu-parser` dependency"
+ cargo add $"nu-parser@($version)"
+ log info "updating the `nu-protocol` dependency"
+ cargo add $"nu-protocol@($version)"
+
+ log warning "do not forget to commit and push this :wink:"
+}