title: Editing NPM packages from forked github repo
body: <p>It happen that I have to modify one of the package I use inside my <code>package.json</code> unfortunatley project does not approve any PR at the moment so I forked the repo and edited <code>package.json</code> to</p>
  
  <pre><code>"dependencies": {
      ....
      "ng2-completer": "2.0.8",
      "ng2-smart-table": "https://github.com/Mixeway/ng2-smart-table.git",
      ....
  }
  </code></pre>
  
  <p>in <code>ng2-smart-table</code> project I have edited one of the file (regarding problem with filtering of nested objects) and pushed it to my repo.</p>
  
  <p>ATM when i try to run my project I get:</p>
  
  <blockquote>
    <p>ERROR in
    ./node_modules/ng2-smart-table/projects/ng2-smart-table/src/lib/lib/data-source/local/local.data-source.ts
    Module build failed (from
    ./node_modules/@ngtools/webpack/src/index.js): Error:
    C:\Users\gsiew\IdeaProjects\MixewayFrontend\node_modules\ng2-smart-table\projects\ng2-smart-table\src\lib\lib\data-source\local\local.data-source.ts
    is missing from the TypeScript compilation. Please make sure it is in
    your tsconfig via the 'files' or 'include' property. The missing file
    seems to be part of a third party library. TS files in published
    libraries are often a sign of a badly packaged library. Please open an
    issue in the library repository to alert its author and ask them to
    package the library using the Angular Package Format
    (...).
        at AngularCompilerPlugin.getCompiledFile (C:\Users\gsiew\IdeaProjects\MixewayFrontend\node_modules@ngtools\webpack\src\angular_compiler_plugin.js:913:23)
        at C:\Users\gsiew\IdeaProjects\MixewayFrontend\node_modules@ngtools\webpack\src\loader.js:41:31
        at runMicrotasks ()
        at processTicksAndRejections (internal/process/task_queues.js:93:5) ERROR in
    ./node_modules/ng2-smart-table/projects/ng2-smart-table/src/lib/ng2-smart-table.module.ts
    Module build failed (from
    ./node_modules/@ngtools/webpack/src/index.js): Error:
    C:\Users\gsiew\IdeaProjects\MixewayFrontend\node_modules\ng2-smart-table\projects\ng2-smart-table\src\lib\ng2-smart-table.module.ts
    is missing from the TypeScript compilation. Please make sure it is in
    your tsconfig via the 'files' or 'include' property. The missing file
    seems to be part of a third party library. TS files in published
    libraries are often a sign of a badly packaged library. Please open an
    issue in the library repository to alert its author and ask them to
    package the library using the Angular Package Format
    (...).
        at AngularCompilerPlugin.getCompiledFile (C:\Users\gsiew\IdeaProjects\MixewayFrontend\node_modules@ngtools\webpack\src\angular_compiler_plugin.js:913:23)
        at C:\Users\gsiew\IdeaProjects\MixewayFrontend\node_modules@ngtools\webpack\src\loader.js:41:31
        at runMicrotasks ()
        at processTicksAndRejections (internal/process/task_queues.js:93:5)</p>
  </blockquote>
  
  <p>could anyone give me a hint what I am doing wrong?</p>