message: fix(build): use os specific path separator in npm run build.watch
  The run build.watch task was not working in windows as it relied on the
  task separator being '/'. Change it to use the OS specific separator
diff: @@ -10,6 +10,7 @@ const buildPkgJson = require('ngm-cli/tasks/npm/build-pkg-json.task');
  const src = 'src';
  const dist = 'dist';
  const common = 'common';
  +const path = require('path');
  let flags = {};
  @@ -57,7 +58,7 @@ if (flags.watch) {
  ignored: /(^|[\/\\])\../
  })
  .on('change', (event) => {
  - let moduleName = event.replace(/src\/(.*)\/.*/i, '$1');
  + let moduleName = event.replace(new RegExp(`src\\${path.sep}(.*)\\${path.sep}(.*)`,'i'), '$1');
  buildModules([moduleName])
  });
  }
  