Expose syntheticNamedExports in module info, added docs

docs/05-plugin-development.md

@@ -647,6 +647,8 @@ Returns additional information about the module in question in the form
   implicitlyLoadedAfterOneOf: string[], // implicit relationships, declared via this.emitChunk
   implicitlyLoadedBefore: string[], // implicit relationships, declared via this.emitChunk
   hasModuleSideEffects: boolean | "no-treeshake" // are imports of this module included if nothing is imported from it
+  meta: {[plugin: string]: any} // custom module meta-data
+  syntheticNamedExports: boolean | string // final value of synthetic named exports
 }
 ```
 

src/Module.ts

@@ -284,7 +284,8 @@ export default class Module {
 			},
 			isEntry,
 			isExternal: false,
-			meta
+			meta,
+			syntheticNamedExports
 		};
 	}
 

src/rollup/types.d.ts

@@ -171,6 +171,7 @@ interface ModuleInfo {
 	isEntry: boolean;
 	isExternal: boolean;
 	meta: CustomPluginOptions;
+	syntheticNamedExports: boolean | string;
 }
 
 export type GetModuleInfo = (moduleId: string) => ModuleInfo | null;