title: Gulp not generating inline sourcemaps
body: <p>I have the following <code>tsconfig.json</code> file in an ASP.NET Core:</p>
  
  <pre><code>{
    "compilerOptions": {
      "target": "es5",
      "module": "commonjs",
      "moduleResolution": "node",
      "inlineSourceMap": true,
      "inlineSources": true,
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "noEmitOnError": false,
      "noImplicitAny": false,
      "removeComments": false,
      "outDir": "wwwroot/client-app"
  },
    "exclude": [
      "node_modules",
      "wwwroot",
      "typings"
    ]
  }
  </code></pre>
  
  <p>When I build the project through Visual Studio the resulting js files have the inline source maps at the end of the file:</p>
  
  <pre><code>/// &lt;reference path="../typings/index.d.ts" /&gt;
  "use strict";
  var platform_browser_dynamic_1 = require('@angular/platform-browser-dynamic');
  var client_application_module_1 = require('./client-application.module');
  platform_browser_dynamic_1.platformBrowserDynamic().bootstrapModule(client_application_module_1.ClientApplicationModule);
  //# sourceMappingURL=data:application/json;base64,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
  </code></pre>
  
  <p>But when I build the js files with Gulp, the inline sourcemap is not being generated, like if it was ignoring the <code>tsconfig.json</code></p>
  
  <p>Here is my Gulp task for transpiling TypeScript to JavaScript:</p>
  
  <pre><code>    var tsProject = ts.createProject('tsconfig.json');
  
      gulp.task('transpile', function ()
      {
          var tsResult = gulp.src(["ClientApp/**/*.ts"])
              .pipe(ts(tsProject), undefined, ts.reporter.fullReporter()).js
              .pipe(gulp.dest('./wwwroot/client-app'));
      });
  </code></pre>
  
  <p>Do I need any extra configuration in Gulp so the inline sourcemaps can be generated? </p>
  
  <p>I'm using TypeScript 1.8.10</p>