Update rollup to v2.45.x

.travis.yml

@@ -1,9 +1,9 @@
 language: node_js
 node_js:
-  - '4'
-  - '6'
-  - '7'
   - '8'
+  - '10'
+  - '12'
+  - '14'
 before_script:
   - npm install -g gulp
 script: gulp ci

gulpfile.js

@@ -1,19 +1,16 @@
 'use strict';
 
-var gulp          = require('gulp-help')(require('gulp'));
+var gulp          = require('gulp');
 var jasmine       = require('gulp-jasmine');
 var SpecReporter  = require('jasmine-spec-reporter').SpecReporter;
 var jshint        = require('gulp-jshint');
 var jscs          = require('gulp-jscs');
-var seq           = require('gulp-sequence');
-
-require('gulp-release-tasks')(gulp);
 
 gulp.task('test', function () {
   return gulp.src(['test/**/*.spec.js'])
-        .pipe(jasmine({
-          reporter: new SpecReporter()
-        }));
+    .pipe(jasmine({
+      reporter: new SpecReporter()
+    }));
 });
 
 gulp.task('jscs', function() {
@@ -30,6 +27,6 @@ gulp.task('jshint', function() {
     .pipe(jshint.reporter('fail'));
 });
 
-gulp.task('lint', seq('jshint', 'jscs'));
+gulp.task('lint', gulp.series('jshint', 'jscs'));
 
-gulp.task('ci', seq('lint', 'test'));
+gulp.task('ci', gulp.series('lint', 'test'));

index.js

@@ -171,7 +171,7 @@ function GulpRollup(options) {
           self.emit('bundle', bundle, entryFile);
 
           if (unifiedCachedModules) {
-            var modules = bundle.modules;
+            var modules = bundle.cache.modules;
             for (var i = 0; i < modules.length; ++i) {
               var module = modules[i], id = module.id;
               if (Object.prototype.hasOwnProperty.call(unifiedCachedModules, id)) {
@@ -186,6 +186,7 @@ function GulpRollup(options) {
 
           return bundle.generate(options);
         }).then(function(result) {
+          const outputFile = result.output[0];
           // get the corresponding entry Vinyl file to output with.
           // this makes file.history work. maybe expando properties too if you use them.
           var file = vinylSystem.resolveId(entryFile);
@@ -195,13 +196,13 @@ function GulpRollup(options) {
           if (file === undefined) { // possible if options.allowRealFiles is true
             file = new File({
               path: entryFile,
-              contents: bufferFrom(result.code)
+              contents: bufferFrom(outputFile.code)
             });
           } else {
-            file.contents = bufferFrom(result.code);
+            file.contents = bufferFrom(outputFile.code);
           }
 
-          var map = result.map;
+          var map = outputFile.map;
           if (map) {
             // This makes sure the paths in the generated source map (file and
             // sources) are relative to file.base: