feat(@angular/cli): add support for ng update --next

Author: hansl

package-lock.json

@@ -16,6 +16,12 @@ const UpdateCommand = Command.extend({
       default: false,
       aliases: ['d'],
       description: 'Run through without making any changes.'
+    },
+    {
+      name: 'next',
+      type: Boolean,
+      default: false,
+      description: 'Install the next version, instead of the latest.'
     }
   ],
 

packages/@angular/cli/commands/update.ts

@@ -4,6 +4,7 @@ import SchematicRunTask from './schematic-run';
 export interface UpdateTaskOptions {
   dryRun: boolean;
   force: boolean;
+  next: boolean;
 }
 
 export const UpdateTask: any = Task.extend({
@@ -17,7 +18,8 @@ export const UpdateTask: any = Task.extend({
 
     const schematicRunOptions = {
       taskOptions: {
-        dryRun: options.dryRun
+        dryRun: options.dryRun,
+        version: options.next ? 'next' : undefined
       },
       workingDir: this.project.root,
       collectionName,