title: Trouble upgrading from angular 9 to angular 10
body: <p>I wanted to update my angular project and I used the following commands.</p>
  <pre><code>$ ng update @angular/core@9 @angular/cli@9
  $ ng update @angular/core @angular/cli
  </code></pre>
  <p>but after executing the last command line in console it throws the following error.</p>
  <pre><code>Your global Angular CLI version (10.0.0) is greater than your local
  version (9.1.9). The local Angular CLI version is used.
  
  To disable this warning use &quot;ng config -g cli.warnings.versionMismatch false&quot;.
  The installed local Angular CLI version is older than the latest stable version.
  Installing a temporary version to perform the update.
  Installing packages for tooling via npm.
  Installed packages for tooling via npm.
  Using package manager: 'npm'
  Collecting installed dependencies...
  Found 40 dependencies.
  Fetching dependency metadata from registry...
                    Package &quot;@ng-select/ng-option-highlight&quot; has an incompatible peer dependency to &quot;@angular/core&quot; (requires &quot;^8.0.3&quot; (extended), would install &quot;10.0.0&quot;).
                    Package &quot;@ng-select/ng-select&quot; has an incompatible peer dependency to &quot;@angular/forms&quot; (requires &quot;&gt;=8.0.0 &lt;9.0.0&quot; 
  (extended), would install &quot;10.0.0&quot;).
                    Package &quot;@ng-select/ng-option-highlight&quot; has an incompatible peer dependency to &quot;@angular/common&quot; (requires &quot;^8.0.3&quot; (extended), would install &quot;10.0.0&quot;).
  × Migration failed: Incompatible peer dependencies found.
  Peer dependency warnings when installing dependencies means that those dependencies might not work correctly together.
  You can use the '--force' option to ignore incompatible peer dependencies and instead address these warnings later.
    See &quot;C:\Users\jfhh\AppData\Local\Temp\ng-riDjkX\angular-errors.log&quot; for further details.
  </code></pre>