title: How to fix ' ERROR in node_modules/@types/prismjs/index.d.ts error Cannot find name Required' error in angular
body: <p>I install <code>@types/prismjs</code> but i have this problem 
  in <code>node_modules/@types/prismjs/index.d.ts(316,10): error TS2304: Cannot find name 'Required'</code>.</p>
  
  <p>Angular</p>
  
  <p>config.ts</p>
  
  <pre><code>    { "compileOnSave": false, "compilerOptions":
   { "baseUrl": "./", "outDir": "./dist/out-tsc", "sourceMap": true,
   "declaration": false, "module": "es2015", "moduleResolution": "node",
   "emitDecoratorMetadata": true, "experimentalDecorators": true, "target": "es5", "typeRoots": [ "node_modules/@types" ], "lib": [ "es2017", "dom" ] } } }
  </code></pre>