Cannot parse with webidl2 because [] is deprecated

[bglgwyng]

I'm trying to generate typescript definition d.ts from ammo.idl using webidl2.

import * as fs from "fs";
import WebIDL2 from "webidl2";

const source = fs.readFileSync("./ammo.idl").toString();
const ast = WebIDL2.parse(source, { allowNestedTypedefs: true });

But it gave me an error

D:\webidl-typer\node_modules\webidl2\lib\webidl2.js:142
      throw new WebIDLParseError(message, line, tok, tokens.slice(0, maxTokens));
      ^
Got an error during or right after parsing `interface btTransform`: Unterminated operation, line 82 (tokens: 'float[] m')

So I tested

interface test {
  void test(float a[]);
};

and the same error came out.
According to this commit and also this one,
[] seems deprecated in the latest webidl syntax.
From my understanding, just removing [] to make float[] sequence<float> is the right adjustment.