fix: Use named imports from @cucumber/gherkin for ESM compatibility

- Changed from default import to named imports (AstBuilder, GherkinClassicTokenMatcher, Parser)
- Fixes TypeError: Cannot read properties of undefined (reading 'AstBuilder')
- @cucumber/gherkin exports named exports in ESM, not a default export

Bump version to 4.0.0-beta.20

Author: kobenguyent

lib/mocha/gherkin.js

@@ -1,4 +1,4 @@
-import Gherkin from '@cucumber/gherkin'
+import { AstBuilder, GherkinClassicTokenMatcher, Parser } from '@cucumber/gherkin'
 import { IdGenerator } from '@cucumber/messages'
 import { Context, Suite } from 'mocha'
 import debug from 'debug'
@@ -15,9 +15,9 @@ import { createTest } from './test.js'
 import { matchStep } from './bdd.js'
 
 const uuidFn = IdGenerator.uuid()
-const builder = new Gherkin.AstBuilder(uuidFn)
-const matcher = new Gherkin.GherkinClassicTokenMatcher()
-const parser = new Gherkin.Parser(builder, matcher)
+const builder = new AstBuilder(uuidFn)
+const matcher = new GherkinClassicTokenMatcher()
+const parser = new Parser(builder, matcher)
 parser.stopAtFirstError = false
 
 const gherkinParser = (text, file) => {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "codeceptjs",
-  "version": "4.0.0-beta.19",
+  "version": "4.0.0-beta.20",
   "type": "module",
   "description": "Supercharged End 2 End Testing Framework for NodeJS",
   "keywords": [