database:update is broken in 8.16 (Works with 8.15.1)

[ChetanGoti]

[REQUIRED] Environment info

firebase-tools:
8.16.0

Platform:
macOS

[REQUIRED] Test case

`firebase database:set throws error with v8.16.0

[REQUIRED] Steps to reproduce

firebase database:update --token MY_TOKEN --project MY_PROJECT  /app -y --data '{"test": "2.0.0"}'

[REQUIRED] Expected behavior

It should set the appropriate value in given path /app

[REQUIRED] Actual behavior

Throws error, here is debug log of it.

[debug] [2020-11-12T13:25:41.745Z] TypeError [ERR_INVALID_ARG_TYPE]: The "url" argument must be of type string. Received an instance of Command
    at validateString (internal/validators.js:124:11)
    at Url.parse (url.js:159:3)
    at urlParse (url.js:154:13)
    at Object.urlResolve [as resolve] (url.js:663:10)
    at Object.getDatabaseUrl (/Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/utils.js:62:26)
    at /Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/commands/database-update.js:40:23
    at Generator.next (<anonymous>)
    at /Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/commands/database-update.js:8:71
    at new Promise (<anonymous>)
    at __awaiter (/Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/commands/database-update.js:4:12)
    at Command.actionFn (/Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/commands/database-update.js:35:40)
    at Command.<anonymous> (/Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/command.js:171:25)
    at Generator.next (<anonymous>)
    at fulfilled (/Users/chetangoti/.nvm/versions/node/v14.15.0/lib/node_modules/firebase-tools/lib/command.js:5:58)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
[error]
[error] Error: An unexpected error has occurred.

Note

This is broken since v8.16.0 only. It works as I downgrade to v8.15.1

[bkendall]

Thanks for the report. I know there's been an update in this path recently by me, and I'll take a quick look.