Fix import error for enketo-transformer/web

[raphaelmerx]

Fixes enketo/enketo#759

Re-ordering of types to be before default in the web exports.

from https://nodejs.org/api/packages.html#conditional-exports:

"default" - the generic fallback that always matches. Can be a CommonJS or ES module file. This condition should always come last.

[eyelidlessness]

I had also recently noticed the same note in the Node docs, and intended to make the same change. Thanks for getting to it before I did!

[eyelidlessness]

I'm holding off merging this for a bit, because I saw another issue while installing to test the change in the web demo. It's unrelated to this change (probably related to #181), but it's preventing manual validation there. I'll likely test the change in Core/Express so the unrelated issue doesn't block this.

[eyelidlessness]

I've verified this locally in Core, which will be the basis for a PR there to switch to client rendering in dev mode soon. Local verification has some caveats (local NPM dependencies don't get packaged the way they do when publishing), but I was able to observe a difference in behavior depending on the order.

Some other notes for my future reference (and may be helpful to anyone else adopting the web transform in a project with a similar setup):

• TypeScript (or at least the TypeScript VSCode language server) does not seem to care about this ordering (it depends on typesVersions instead, because of course it does). But other tooling does, notably ESLint and...
• ... typescript-eslint, which was fussy in a whole bunch of other ways. To get ESLint working, all of the following changes were necessary:

  • Install all of these as dev dependencies:

    • @typescript-eslint/eslint-plugin
    • @typescript-eslint/parser
    • eslint-import-resolver-typescript
    • typescript

  • Add all of this to .eslintrc.json (I guess we could skip some of the file extensions, but I think the list is [currently] exhaustive, included as a frame of reference for anyone else who may be interested):

     {
     …
    -  "plugins": ["chai-friendly", "jsdoc", "prettier", "unicorn"],
    +  "plugins": ["@typescript-eslint", "chai-friendly", "jsdoc", "prettier", "unicorn"],
    +  "parser": "@typescript-eslint/parser",
     …
       "settings": {
    +    "import/parsers": {
    +        "@typescript-eslint/parser": [
    +            ".cjs",
    +            ".cts",
    +            ".js",
    +            ".mjs",
    +            ".mts",
    +            ".ts",
    +            ".tsx"
    +        ]
    +    },
    +    "import/resolver": {
    +        "node": true,
    +        "typescript": true
    +    },
     …
       },
     …
       "overrides": {
    +    {
    +        "files": ["./app.js"],
    +        "rules": {
    +            "import/no-extraneous-dependencies": [
    +                "error",
    +                { "devDependencies": true }
    +            ]
    +        }
    +    },
     …
     }

• The build (currently) needs to have libxslt added to external. This is necessary because we currently use a dynamic import to load it in the Node build. We may be able to conditionally compile it out, to make this unnecessary for downstream users in the future.