fix(api): export event context symbols

fixes #503

Author: gund

goldens/ng-dynamic-component/api.md

@@ -268,6 +268,12 @@ export interface InputsType {
 // @public (undocumented)
 export const IoEventArgumentToken: InjectionToken<string>;
 
+// @public
+export const IoEventContextProviderToken: InjectionToken<StaticProvider>;
+
+// @public
+export const IoEventContextToken: InjectionToken<unknown>;
+
 // @public (undocumented)
 export class IoFactoryService {
     constructor(injector: Injector);

projects/ng-dynamic-component/src/lib/io/index.ts

@@ -1,4 +1,5 @@
 export * from './types';
 export * from './event-argument';
+export * from './event-context';
 export * from './io.service';
 export * from './io-factory.service';