fix arg passing

[ashwin-ant]

Fixes #90.

How Has This Been Tested?

Testing locally:

$ npm link
$ npm run build

Without this change, running on a build of main gets:

$ npx @modelcontextprotocol/inspector uv --directory /Users/ashwin/code/example_mcp run example
Starting MCP inspector...
node:internal/errors:496
    ErrorCaptureStackTrace(err);
    ^

TypeError [ERR_PARSE_ARGS_INVALID_OPTION_VALUE]: Option '--args' argument is ambiguous.
Did you forget to specify the option argument for '--args'?
To specify an option argument starting with a dash use '--args=-XYZ'.
    at new NodeError (node:internal/errors:405:5)
    at checkOptionLikeValue (node:internal/util/parse_args/parse_args:87:11)
    at node:internal/util/parse_args/parse_args:361:9
    at Array.forEach (<anonymous>)
    at parseArgs (node:internal/util/parse_args/parse_args:357:3)
    at file:///Users/ashwin/code/mcp/inspector/server/build/index.js:14:20
    at ModuleJob.run (node:internal/modules/esm/module_job:195:25)
    at async ModuleLoader.import (node:internal/modules/esm/loader:337:24)
    at async loadESM (node:internal/process/esm_loader:34:7)
    at async handleMainPromise (node:internal/modules/run_main:106:12) {
  code: 'ERR_PARSE_ARGS_INVALID_OPTION_VALUE'
}

Node.js v18.20.4

🔍 MCP Inspector is up and running at http://localhost:5173 🚀

After this change:

$ npx @modelcontextprotocol/inspector uv --directory /Users/ashwin/code/example_mcp run example
Starting MCP inspector...

🔍 MCP Inspector is up and running at http://localhost:5173 🚀

No error.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed