TypeError: Class constructors cannot be invoked without 'new'

[rodriguezmarting]

Updating to latest postcss version using Broccoli is throwing a type error, tried with different approaches but none worked:

Using "broccoli-postcss": "6.1.0" which uses "postcss": "8.1.4"
Same error using "broccoli-postcss-single": "5.0.2" which also uses "postcss": "8.1.4"

My brocfile:

...
const postcss = require("broccoli-postcss");
...

export default ({env}) => {

  ...

  const cssPlugins = {
    plugins: [
      {
        module: postcssMixins
      },
      {
        module: postcssMomentumScrolling
      },
      {
        module: postcssPresetEnv,
        options: {
          stage: 0, 
          preserve: false,
        }
      },
    ]
  };

  ...


  postcss("css", {plugins: cssPlugins})

  ...

After adding the new keyword it throws the following error:

[rodriguezmarting]

This needs to be addressed here based on: postcss/postcss#1833