type=module; update dependencies

[mbostock]

Supersedes part of #436; let’s change that PR into just the mode reducer.

One interesting review note: the caltrain.js test had to be tweaked because it was mixing strings and numbers in the y-scale. In D3 6, the numbers were coerced to strings and considered equivalent; in D3 7, ordinal scales now use InternMap which considers these values to be distinct. I like that the code is more explicit now.

[Fil]

I had the same remark for caltrain, which I had changed differently. I prefer your version (change the data rather than the accessors).

[Fil]

I can't build the bundle:

❯ yarn prepublishOnly
yarn run v1.22.5
$ rm -rf dist && rollup -c
[!] Error: Package subpath './package.json' is not defined by "exports" in /Users/fil/Sites/plot/node_modules/d3/package.json
Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './package.json' is not defined by "exports" in /Users/fil/Sites/plot/node_modules/d3/package.json
    at new NodeError (node:internal/errors:278:15)
    at throwExportsNotFound (node:internal/modules/esm/resolve:321:9)
    at packageExportsResolve (node:internal/modules/esm/resolve:546:3)
    at resolveExports (node:internal/modules/cjs/loader:473:36)
    at Function.Module._findPath (node:internal/modules/cjs/loader:513:31)
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:911:27)
    at Function.Module._load (node:internal/modules/cjs/loader:769:27)
    at Module.require (node:internal/modules/cjs/loader:997:19)
    at require (node:internal/modules/cjs/helpers:92:18)
    at Object.<anonymous> (/Users/fil/Sites/plot/rollup.config.js:47:12)

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

The error message seems to imply that we have to add "./package.json": "./package.json" in d3's exports, but that in turns creates more issues. I'm not sure what's happening.

[mbostock]

Strange. You might need Node 14? Actually maybe I didn’t test that step and only ran the tests. I’ll check.

[Fil]

❯ node -v
v15.5.0

[mbostock]

Yea, I hadn’t run prepublishOnly. I can reproduce and will work on a fix.

[mbostock]

Okay, fixed by using the relative path ./node_modules/d3/package.json, which is a little dirty, but I don’t think there’s a supported way of either resolving the path of a non-exported file (even package.json) or resolving the path to the package directory (i.e., ./node_modules/d3). If there is I’m happy to switch to it but this should work for our purposes, especially since this is only needed for us to publish.