gulpfile.js
function copy(cb) {
    gulp.src(['adal-angular.d.ts']).pipe(gulp.dest('./dist/'));
    console.log('adal-angular.d.ts Copied to Dist Directory');

    gulp.src(['README.md']).pipe(gulp.dest('./dist/'));
    console.log('README.md Copied to Dist Directory');

    cb();
}
function copy(cb) {
    gulp.src(['adal-angular.d.ts']).pipe(gulp.dest('./dist/'));
    console.log('adal-angular.d.ts Copied to Dist Directory');

    gulp.src(['README.md']).pipe(gulp.dest('./dist/'));
    console.log('README.md Copied to Dist Directory');

    cb();
}
function copy ( cb ) { gulp . src ( [ 'adal-angular.d.ts' ] ) . pipe ( gulp . dest ( './dist/' ) ) ; console . log ( 'adal-angular.d.ts Copied to Dist Directory' ) ; gulp . src ( [ 'README.md' ] ) . pipe ( gulp . dest ( './dist/' ) ) ; console . log ( 'README.md Copied to Dist Directory' ) ; cb ( ) ; }
4.  include type definition file for adal-angular
4 . include type definition file for adal - angular