change option from bundle to cache

src/Bundle.js

@@ -19,8 +19,8 @@ import { dirname, isRelative, isAbsolute, relative, resolve } from './utils/path
 
 export default class Bundle {
 	constructor ( options ) {
-		if ( typeof options.bundle === 'object' ) {
+		if ( typeof options.cache === 'object' ) {
-			this.cachedModules = options.bundle.modules.reduce((modules, module) => {
+			this.cachedModules = options.cache.modules.reduce((modules, module) => {
 				modules[module.id] = module;
 				return modules;
 			}, {});

src/rollup.js

@@ -9,6 +9,7 @@ export const VERSION = '<@VERSION@>';
 
 const ALLOWED_KEYS = [
 	'banner',
+	'cache',
 	'dest',
 	'entry',
 	'exports',
@@ -28,8 +29,7 @@ const ALLOWED_KEYS = [
 	'sourceMap',
 	'targets',
 	'treeshake',
-	'useStrict',
+	'useStrict'
-	'bundle'
 ];
 
 export function rollup ( options ) {

test/test.js

@@ -464,7 +464,7 @@ describe( 'rollup', function () {
 				return rollup.rollup({
 					entry: path.join( INCREMENTAL, 'not-transform-twice', 'main.js' ),
 					plugins: [counter],
-					bundle
+					cache: bundle
 				});
 			}).then( function ( bundle ) {
 				assert.equal( calls, 2 );
@@ -509,7 +509,7 @@ describe( 'rollup', function () {
 				return rollup.rollup({
 					entry: path.join( INCREMENTAL, 'transform-changed', 'main.js' ),
 					plugins: [counter],
-					bundle
+					cache: bundle
 				});
 			}).then( function ( bundle ) {
 				assert.equal( calls, 3 );