Fix incompatibility with strict/safe CSP

[tdelmas]

https://github.com/d3/d3-fetch/blob/master/src/dsv.js use csvParse and tsvParse from "d3-dsv"

As explained in d3/d3-dsv#65 by @mbostock :

I recommend using parseRows as suggested in the text you pasted from the README and a row function to turn the array of field values into an object.

Using csvParse or tsvParse make it incompatible with CSP without unsafe-eval.

It impact for example plotly/plotly.js#897 (which use the old version of d3 "3.5.17" so "d3-request" and not this package, but "d3-request" has the exact same problem. I didn't opened an issue there as its status is "This module is deprecated as of D3 5.0; please use d3-fetch instead.")

Or is there another API from this package that can be used to avoid that problem?

[mbostock]

Use d3.text or use fetch directly.

d3.csvParseRows(await d3.text("path/to/file.csv"))

fetch("path/to/file.csv")
  .then(response => response.text())
  .then(text => d3.csvParseRows(text))