After update to Angular 8 CLI throws ".getColorDepth is not a function"

Look in the problematic file ./node_modules/@angular/cli/utilities/color.js. Notice a comment above the problematic line (15):

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
 const colors = require("ansi-colors");
 exports.colors = colors;
 const tty_1 = require("tty");
 // Typings do not contain the function call (added in Node.js v9.9.0)
 exports.supportsColor = process.stdout instanceof tty_1.WriteStream &&
    process.stdout.getColorDepth() > 1;
 colors.enabled = exports.supportsColor;

Specifically:

// Typings do not contain the function call (added in Node.js v9.9.0)

Upgrading Node to a version no less than v9.9.0 fixes the problem.

but...

...choosing how to upgrade NodeJS is not necessairly straightforward. See How do I update Node.js?. Some popular answers are quite far down the page so it's worth scrolling through.

had the same error,
my versions:

Angular CLI: 8.1.1
Node: 11.14.0
OS: linux x64
Angular: 8.1.1

run:

rm -rf node_modules
rm -rf package-lock.json
sudo npm cache clean --force
npm install