title: __WEBPACK_IMPORTED_MODULE_4_moment__ is not a function - tests fail with today's moment release
body: <p>Just performed an npm update and a new version of moment (for Angular) came in (version 2.19.0).</p>
  
  <p>Now I get this error message when one of my tests run, I get this error.  I am also using WebPack so perhaps some incompatibility has been introduced?</p>