Add d3-dsv library to mask-extension example's dependencies

[willemarcel]

Background

It was missing to install d3-dsv library in the mask-extension example. The example code doesn't run without it.

Change List

• Include d3-dsv in the dependencies list.

[felixpalmer]

Runs fine for me without this. This module is not mentioned anywhere in the code

[willemarcel]

I see this error when I try to run it without installing d3-dsv

examples/website/mask-extension on  master [!] 
❯ yarn start
yarn run v1.22.11
$ vite --open

  VITE v4.5.5  ready in 350 ms

  ➜  Local:   http://127.0.0.1:5173/
  ➜  Network: use --host to expose
  ➜  press h to show help
✘ [ERROR] Could not resolve "d3-dsv"

    node_modules/@loaders.gl/csv/dist/lib/encoders/encode-csv.js:6:30:
      6 │ import { csvFormatRows } from 'd3-dsv';
        ╵                               ~~~~~~~~

  You can mark the path "d3-dsv" as external to exclude it from the bundle, which will remove this
  error.

/Users/wille/projects/deck.gl/examples/website/mask-extension/node_modules/esbuild/lib/main.js:1649
  let error = new Error(`${text}${summary}`);
              ^

Error: Build failed with 1 error:
node_modules/@loaders.gl/csv/dist/lib/encoders/encode-csv.js:6:30: ERROR: Could not resolve "d3-dsv"
    at failureErrorWithLog (/Users/wille/projects/deck.gl/examples/website/mask-extension/node_modules/esbuild/lib/main.js:1649:15)
    at /Users/wille/projects/deck.gl/examples/website/mask-extension/node_modules/esbuild/lib/main.js:1058:25
    at /Users/wille/projects/deck.gl/examples/website/mask-extension/node_modules/esbuild/lib/main.js:1525:9
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  errors: [
    {
      detail: undefined,
      id: '',
      location: {
        column: 30,
        file: 'node_modules/@loaders.gl/csv/dist/lib/encoders/encode-csv.js',
        length: 8,
        line: 6,
        lineText: "import { csvFormatRows } from 'd3-dsv';",
        namespace: '',
        suggestion: ''
      },
      notes: [
        {
          location: null,
          text: 'You can mark the path "d3-dsv" as external to exclude it from the bundle, which will remove this error.'
        }
      ],
      pluginName: '',
      text: 'Could not resolve "d3-dsv"'
    }
  ],
  warnings: []
}
error Command failed with exit code 1.