@angular-devkit/build-angular package doesn't reflect master

[crooksey]

🐞 Bug report

Command (mark with an x)

- [X] build
- [X] serve

Description

https://github.com/angular/angular-cli/blob/master/packages/angular_devkit/build_angular/src/angular-cli-files/models/jit-polyfills.js

References

import 'core-js/proposals/reflect-metadata';

However, my installed version (on a clean node modules) shows

import 'core-js/es7/reflect';

This code was updated approx 6 weeks ago in master, yet is still not published on a recent release to npm,

🔬 Minimal Reproduction

Install latest package, view installed polyfill

🔥 Exception or Error

ERROR in ./node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/jit-polyfills.js
Module not found: Error: Can't resolve 'core-js/es7/reflect' in '/home/luke/nodejs/ecom2/ecom2-frontend/node_modules/@angular-devkit/build-angular/src/angular-cli-files/models'
ℹ ｢wdm｣: Failed to compile.

🌍 Your Environment

@angular-devkit/architect         0.13.9
@angular-devkit/build-angular     0.13.9
@angular-devkit/build-optimizer   0.13.9
@angular-devkit/build-webpack     0.13.9
@angular-devkit/core              7.3.9
@angular-devkit/schematics        7.3.9
@angular/cli                      7.3.9
@ngtools/webpack                  7.3.9
@schematics/angular               7.3.9
@schematics/update                0.13.9
rxjs                              6.5.2
typescript                        3.1.3
webpack                           4.29.0

[alan-agius4]

Hi, support for core-js version 3+ has been added in version 8 https://github.com/angular/angular-cli/releases/tag/v8.0.0-beta.13

Also, kindly note that the current master is for version 8.1

Related issue: #13954

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