message: fix(compat): add package.json for internal-compatibility package
diff: @@ -110,6 +110,7 @@ fs.copySync('src/operators/package.json', PKG_ROOT + '/operators/package.json');
  fs.copySync('src/ajax/package.json', PKG_ROOT + '/ajax/package.json');
  fs.copySync('src/websocket/package.json', PKG_ROOT + '/websocket/package.json');
  fs.copySync('src/testing/package.json', PKG_ROOT + '/testing/package.json');
  +fs.copySync('src/internal-compatibility/package.json', PKG_ROOT + '/internal-compatibility/package.json');
  if (fs.existsSync(UMD_ROOT)) {
  