changelog Formatter in typescript don't work as expected

[fauxbytes]

Following this doc, I attempted to implement a changeset formatter:

config,json:

{
  "$schema": "https://unpkg.com/@changesets/config@3.0.0/schema.json",
  "changelog": "./changelog-formatter.ts",
  "commit": false,
  "access": "restricted",
  "baseBranch": "master"
}

changelog-formatter.ts:

import orig from "@changesets/changelog-git";
import { ChangelogFunctions, NewChangesetWithCommit, VersionType } from "@changesets/types";

/**
 * override default formatting: mostly same as default, but with getReleaseLine() excluding commit SHAs 
 */
const defaultChangelogFunctions: ChangelogFunctions = {
    getReleaseLine: async (changeset: NewChangesetWithCommit, _type: VersionType) => {
        const [firstLine, ...futureLines] = changeset.summary.split("\n").map((l) => l.trimEnd());
        return `- ${firstLine}` + (futureLines.length > 0 ? `\n${futureLines.map((l) => `  ${l}`).join("\n")}` : "");
    },
    getDependencyReleaseLine: async (...args) => orig.getDependencyReleaseLine(...args),
};

export default defaultChangelogFunctions;

$ npx changeset version
🦋  error #####\.changeset\changelog-formatter.ts:1
🦋  error import orig from "@changesets/changelog-git";
🦋  error ^^^^^^
🦋  error
🦋  error SyntaxError: Cannot use import statement outside a module
🦋  error     at internalCompileFunction (node:internal/vm:73:18)
🦋  error     at wrapSafe (node:internal/modules/cjs/loader:1176:20)
🦋  error     at Module._compile (node:internal/modules/cjs/loader:1218:27)
🦋  error     at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)
🦋  error     at Module.load (node:internal/modules/cjs/loader:1117:32)
🦋  error     at Module._load (node:internal/modules/cjs/loader:958:12)
🦋  error     at Module.require (node:internal/modules/cjs/loader:1141:19)
🦋  error     at require (node:internal/modules/cjs/helpers:110:18)
🦋  error     at getNewChangelogEntry (#####\node_modules\@changesets\apply-release-plan\dist\changesets-apply-release-plan.cjs.js:372:31)
🦋  error     at Object.applyReleasePlan [as default] (#####\node_modules\@changesets\apply-release-plan\dist\changesets-apply-release-plan.cjs.js:280:37)

Possibly, there's more required to put together an working typescript formatter? A working sample would go a long way.
Thanks,