fix(@angular/cli): update several config warning messages

Author: alan-agius4

packages/@angular/cli/lib/init.ts

@@ -91,7 +91,7 @@ resolve('@angular/cli', { basedir: process.cwd() },
         Your global Angular CLI version (${globalVersion}) is greater than your local
         version (${localVersion}). The local Angular CLI version is used.
 
-        To disable this warning use "ng set --global warnings.versionMismatch=false".
+        To disable this warning use "ng config -g cli.warnings.versionMismatch false".
         `);
         // Don't show warning colorised on `ng completion`
         if (process.argv[2] !== 'completion') {

packages/@angular/cli/upgrade/version.ts

@@ -162,7 +162,7 @@ export class Version {
 
             npm install typescript@'${currentCombo.typescript}'
 
-        To disable this warning run "ng set warnings.typescriptMismatch=false".
+        To disable this warning run "ng config cli.warnings.typescriptMismatch false".
       ` + '\n')));
     }
   }

packages/@angular/cli/utilities/check-package-manager.ts

@@ -19,16 +19,16 @@ export function checkYarnOrCNPM() {
       .then((data: Array<boolean>) => {
         const [isYarnInstalled, isCNPMInstalled] = data;
         if (isYarnInstalled && isCNPMInstalled) {
-          console.log(chalk.yellow('You can `ng set --global packageManager=yarn` '
-            + 'or `ng set --global packageManager=cnpm`.'));
+          console.log(chalk.yellow('You can `ng config -g cli.packageManager yarn` '
+            + 'or `ng config -g cli.packageManager cnpm`.'));
         } else if (isYarnInstalled) {
-          console.log(chalk.yellow('You can `ng set --global packageManager=yarn`.'));
+          console.log(chalk.yellow('You can `ng config -g cli.packageManager yarn`.'));
         } else if (isCNPMInstalled) {
-          console.log(chalk.yellow('You can `ng set --global packageManager=cnpm`.'));
+          console.log(chalk.yellow('You can `ng config -g cli.packageManager cnpm`.'));
         } else  {
           if (packageManager !== 'default' && packageManager !== 'npm') {
             console.log(chalk.yellow(`Seems that ${packageManager} is not installed.`));
-            console.log(chalk.yellow('You can `ng set --global packageManager=npm`.'));
+            console.log(chalk.yellow('You can `ng config -g cli.packageManager npm`.'));
           }
         }
       });

tests/e2e/tests/commands/new/check-yarn.ts

@@ -1,7 +1,7 @@
 import {ng} from '../../../utils/process';
 import {getGlobalVariable} from '../../../utils/env';
 
-const yarnRegEx = /You can `ng set --global packageManager=yarn`./;
+const yarnRegEx = /You can `ng config -g cli.packageManager yarn`./;
 
 export default function() {
   return Promise.resolve()