feat: Better cli args parsing, npm client detection, tag flag

.vscode/launch.json

@@ -0,0 +1,14 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "program": "${workspaceFolder}/index.js"
+        }
+    ]
+}

README.md

@@ -4,17 +4,30 @@ CLI tool for updating multiple packages of the same scope simultaneously
 ## Usage
 
 ```
-npx update-by-scope <scope> [npmClient=yarn] [npmClientCommand=upgrade]
+npx update-by-scope <scope>
 ```
 
-If you use Yarn, it's only enough to specify the scope, e.g. `npx update-by-scope @example`. It will find all the packages which name starts with provided `scope` value inside the `package.json` and will run `yarn upgrade @example/foo@latest @example/bar@latest ...`.
 
-If you use NPM as a client, you will have to also provide `npm install` as a client name and command to use. 
+Tool tries to detect which NPM client you use, for example if it's Yarn, it will find all the packages which name starts with provided `scope` value inside the `package.json` and will run `yarn upgrade @example/foo@latest @example/bar@latest ...`.
+
+If you want to manually specify an NPM client and command it should use, you can write it after scope argument or with `-n` and `-c` flags. 
 
 ```
 npx update-by-scope @example npm install
 ```
 
+or
+
+```
+npx update-by-scope -n npm -c install @example
+```
+
 In this case it will run `npm install @example/foo@latest @example/bar@latest ...`
 
+It's also possible to specify NPM tag with a flag `--tag` or `-t`:
+
+```
+npx update-by-scope -t next @example
+```
+
 *If you have any ideas on how to improve the tool, feel free to open an issue or a PR.*