export IConfiguration interface for API users (#2064)

* export IConfiguration interface for API users

* update CHANGELOG.md

* add tsd test

CHANGELOG.md

@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 Please see [CONTRIBUTING.md](https://github.com/cucumber/cucumber/blob/master/CONTRIBUTING.md) on how to contribute to Cucumber.
 
 ## [Unreleased]
+### Fixed
+- Export `IConfiguration` type on API entry point ([#2064](https://github.com/cucumber/cucumber-js/pull/2064))
 
 ## [8.3.0] - 2022-06-11
 ### Added

src/api/index.ts

@@ -5,6 +5,7 @@
  * @packageDocumentation
  */
 
+export { IConfiguration } from '../configuration'
 export * from './load_configuration'
 export * from './load_sources'
 export * from './load_support'

test-d/api.ts

@@ -1,5 +1,8 @@
-import { loadConfiguration, runCucumber } from '../api'
+import { IConfiguration, loadConfiguration, runCucumber } from '../api'
 
 // should allow api usage from /api subpath
-const { runConfiguration } = await loadConfiguration()
+const provided: Partial<IConfiguration> = {
+  paths: ['features/foo.feature'],
+}
+const { runConfiguration } = await loadConfiguration({ provided })
 const { success } = await runCucumber(runConfiguration)