data parameter does not support single value (appendData, updateData)

[dive-deeper]

Describe the bug
When using appendData or updateData, providing a single value e.g. "data": [[ 1 ]] is invalid.

To Reproduce
Steps to reproduce the behavior:

1. Create a workflow that uses updateData and has a single value in a double array in the data field, for example:

jobs:
  test:
    steps:     
       - name: Gsheet action
         uses: jroehl/gsheet.action@v2.1.1
         with:
           spreadsheetId: <id>
           commands: |
             [ 
               {  "command": "updateData", "args": { "worksheetTitle": "test1", "data": [[1]], "range": "B1"}} 
             ]
          env:
            GSHEET_CLIENT_EMAIL: ${{ secrets.GSHEET_CLIENT_EMAIL }}
            GSHEET_PRIVATE_KEY: ${{ secrets.GSHEET_PRIVATE_KEY }}

2. Execute the workflow
3. Data validation error occurs: ::error::Check "data" property - has to be supplied as nested array ([["1", "2"], ["3", "4"]]). Admittedly, the error does not come directly from this repo and instead from google-sheet-cli. I took a quick look at the code over there and at first glance it looks ok, so maybe it's got something to do on how the data gets passed over? Just guessing though

Expected behavior
The action should be successful

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: Linux (Ubuntu)
• Version 22.04

Additional context
Adding a second value "solves" the problem, but I think it should be possible to update just one value...
Thank you for the action :)

[dive-deeper]

I tested a little more and it seems it does take some single values but others not. For example it does take a function like the one you mentioned in issue #371. A random string also works e.g. [[ "test" ]]. However ints or numbers in strings e.g. [[ 42 ]] or [[ "42" ]] won't work.

Browsing through the google api python client docs I noticed it said null values would be ignored. Seems to be the case here as well. So something like [[ 42, null ]] works and doesn't seem to have any side effects. My problem is thereby solved with a slight workaround but this still seems like a bug to me :)