message: ensure terser does not produce IE 11 incompatible bundles
diff: @@ -61,7 +61,7 @@ export function createWebpackConfiguration({
  `Licenses: ${licenseFilename}`,
  },
  terserOptions: {
  - ecma: 8,
  + ecma: 5,
  warnings: false,
  // Per one of the authors of Preact, the extra pass may inline more esmodule imports
  // @see https://github.com/webpack-contrib/mini-css-extract-plugin/pull/509#issuecomment-599083073
  