fix(DoIUse): support string constructor argument

Interpret string options as shorthand for browser option.

This was supported before the move to ESM.

lib/DoIUse.js

@@ -19,17 +19,24 @@ import Detector from './Detector.js';
  * @return {any}
  */
 
+/**
+ * @typedef {Object} DoIUseOptions
+ * @prop {ConstructorParameters<typeof BrowserSelection>[0]} [browsers]
+ * @prop {FeatureKeys[]} [ignore]
+ * @prop {OnFeatureUsage} [onFeatureUsage]
+ * @prop {string[]} [ignoreFiles]
+ */
+
 export default class DoIUse {
   static default = null;
 
   /**
-   * @param {Object} [options]
-   * @param {ConstructorParameters<typeof BrowserSelection>[0]} [options.browsers]
-   * @param {FeatureKeys[]} [options.ignore]
-   * @param {OnFeatureUsage} [options.onFeatureUsage]
-   * @param {string[]} [options.ignoreFiles]
+   * @param {DoIUseOptions} [optionsOrBrowserQuery]
    */
-  constructor(options = {}) {
+  constructor(optionsOrBrowserQuery) {
+    const options = (typeof optionsOrBrowserQuery === 'string')
+      ? { browsers: optionsOrBrowserQuery }
+      : { ...optionsOrBrowserQuery };
     this.browserQuery = options.browsers;
     this.onFeatureUsage = options.onFeatureUsage;
     this.ignoreOptions = options.ignore;
@@ -39,11 +46,11 @@ export default class DoIUse {
   }
 
   /**
-   * @param {Object} [opts]
-   * @param {ConstructorParameters<typeof BrowserSelection>[1]} [opts.from]
+   * @param {Object} [options]
+   * @param {ConstructorParameters<typeof BrowserSelection>[1]} [options.from]
    */
-  info(opts = {}) {
-    const { browsers, features } = BrowserSelection.missingSupport(this.browserQuery, opts.from);
+  info(options = {}) {
+    const { browsers, features } = BrowserSelection.missingSupport(this.browserQuery, options.from);
 
     return {
       browsers,