Merge pull request #112: Add concurrency to update command

Cargo.toml

@@ -19,6 +19,8 @@ reqwest = { version = "^0.12.0", features = [ "rustls-tls" ], default-features =
 async-trait = "0.1.52"
 lenient_semver_parser = { version = "0.4.2", default-features = false }
 lenient_version = { version = "0.4.2" }
+futures = "0.3.31"
+crossterm = { version = "0.28.1", default-features = false }
 
 [dev-dependencies]
 envtestkit = "1.1.2"

README.md

@@ -122,7 +122,7 @@ SUBCOMMANDS:
                     `default.nix` and never touch your sources.json
     remove          Removes one pin entry
     show            Lists the current pin entries
-    update          Updates all or the given pin to the latest version
+    update          Updates all or the given pins to the latest version
     upgrade         Upgrade the sources.json and default.nix to the latest format version. This may occasionally
                     break Nix evaluation!
 ```
@@ -314,7 +314,7 @@ You can decide to update only selected dependencies, or all at once. For some pi
 ```console
 $ npins help update
 npins-update 0.2.4
-Updates all or the given pin to the latest version
+Updates all or the given pins to the latest version
 
 USAGE:
     npins update [FLAGS] [OPTIONS] [names]...
@@ -327,11 +327,13 @@ FLAGS:
     -p, --partial    Don't update versions, only re-fetch hashes
 
 OPTIONS:
-    -d, --directory <folder>    Base folder for sources.json and the boilerplate default.nix [env: NPINS_DIRECTORY=]
-                                [default: npins]
+    -d, --directory <folder>
+            Base folder for sources.json and the boilerplate default.nix [env: NPINS_DIRECTORY=]  [default: npins]
+
+        --max-concurrent-downloads <max-concurrent-downloads>    Maximum number of simultaneous downloads [default: 5]
 
 ARGS:
-    <names>...    Update only those pins
+    <names>...    Updates only the specified pins
 ```
 
 ### Upgrading the pins file