title: The error shows even after CLI is upgraded- The serve command requires to be run in an Angular project, but a project definition could not be found
body: <p>I have tried updating the cli version and below is the details:
  After this also i can see the error. The npm install, cache clean or build doesnot work.</p>
  
  <pre><code> Angular CLI: 8.3.17
   Node: 10.16.3
   OS: win32 x64
   Angular: 8.2.13
   ... animations, common, compiler, compiler-cli, core, forms
   ... language-service, platform-browser, platform-browser-dynamic
   ... router
  
   Package                           Version
   -----------------------------------------------------------
   @angular-devkit/architect         0.803.17
   @angular-devkit/build-angular     0.803.17
   @angular-devkit/build-optimizer   0.803.17
   @angular-devkit/build-webpack     0.803.17
   @angular-devkit/core              8.1.1
   @angular-devkit/schematics        0.4.2
   @angular/cli                      8.3.17
   @angular/http                     4.4.7
   @ngtools/json-schema              1.1.0
   @ngtools/webpack                  8.3.17
   @schematics/angular               8.3.17
   @schematics/update                0.803.17
   rxjs                              6.5.3
   typescript                        3.5.3
   webpack                           4.35.3
  </code></pre>
  
  <p>Thanks in advance.</p>