git node wpt <name> crashes if <name> isn't found

I just encountered this whilst trying to pull in the FileAPI tests for a backport, and I'd written:

$ git node wpt File

Instead of:

$ git node wpt FileAPI

Which resulted in the following crash:

$ git node wpt File
   ⚠  Please create File.json in test/wpt/status
------------------------- Checking updates for File... -------------------------
No records for File in local test/fixtures/wpt/versions.json
pulling files from scratch...
----------------- Writing assets to test/fixtures/wpt/File... ------------------
⠧ Querying asset list for File...TypeError: Cannot read properties of undefined (reading 'oid')
    at GitHubTree._getLastCommit (file:///usr/local/lib/node_modules/node-core-utils/lib/github/tree.js:38:56)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async GitHubTree.getLastCommit (file:///usr/local/lib/node_modules/node-core-utils/lib/github/tree.js:48:23)
    at async GitHubTree.getFiles (file:///usr/local/lib/node_modules/node-core-utils/lib/github/tree.js:100:20)
    at async WPTUpdater.getAssetList (file:///usr/local/lib/node_modules/node-core-utils/lib/wpt/index.js:61:34)
    at async WPTUpdater.pullAllAssets (file:///usr/local/lib/node_modules/node-core-utils/lib/wpt/index.js:73:16)
    at async WPTUpdater.update (file:///usr/local/lib/node_modules/node-core-utils/lib/wpt/index.js:160:5)
    at async main (file:///usr/local/lib/node_modules/node-core-utils/components/git/wpt.js:80:5)```

It may need a check to see if the specified `<name>` is even a web platform test case, here I'd expect it to exit with -1 and a message saying "We couldn't find the File WPT tests, maybe you misspelled or have the wrong API identifier?"

Bắt đầu bằng cách tái hiện git node wpt File, sau đó kiểm tra components/git/wpt.js, lib/wpt/index.js và lib/github/tree.js theo stack trace. Được xem là hoàn tất khi một tên WPT không xác định thoát một cách gọn gàng với thông báo hữu ích, thay vì cố thực hiện việc tra cứu rồi bị crash.