title: Cannot find module '@angular-devkit/schematics/tasks'
body: <p>when I try to add <code>@angular/material</code> to my project I get this error.<br>
  <em>Using Angular Cli: 7.2.1, Node 11.6.0</em></p>
  
  <blockquote>
    <p>Cannot find module '@angular-devkit/schematics/tasks'<br>
    &nbsp;&nbsp;&nbsp;Error: Cannot find module '@angular-devkit/schematics/tasks'<br>
    &nbsp;&nbsp;&nbsp;at Function.Module._resolveFilename (internal/modules  /cjs/loader.js:603:15)<br>
    &nbsp;&nbsp;&nbsp;at Function.Module._load (internal/modules/cjs/loader.js:529:25)<br>
    &nbsp;&nbsp;&nbsp;at Module.require (internal/modules/cjs/loader.js:657:17)<br>
    &nbsp;&nbsp;&nbsp;at require (internal/modules/cjs/helpers.js:22:18)<br>
    &nbsp;&nbsp;&nbsp;at Object. (/Users/ricardobaeza/Projects/node_modules/@angular/material/schematics/ng-add/index.js:10:17)<br>
    &nbsp;&nbsp;&nbsp;at Module._compile (internal/modules/cjs/loader.js:721:30)<br>
    &nbsp;&nbsp;&nbsp;at Object.Module._extensions..js (internal/modules/cjs/loader.js:732:10)<br>
    &nbsp;&nbsp;&nbsp;at Module.load (internal/modules/cjs/loader.js:620:32)<br>
    &nbsp;&nbsp;&nbsp;at tryModuleLoad (internal/modules/cjs/loader.js:560:12)<br>
    &nbsp;&nbsp;&nbsp;at Function.Module._load (internal/modules/cjs/loader.js:552:3)</p>
  </blockquote>