Added minified version.

gulpfile.js

@@ -0,0 +1,14 @@
+const {src, dest, parallel} = require('gulp');
+const uglify = require('gulp-uglify');
+const rename = require('gulp-rename');
+
+function minify() {
+    return src([
+        'dist/iwmlib.3rdparty.js'
+    ], {sourcemaps: false})
+        .pipe(rename({extname: '.min.js'}))
+        .pipe(uglify())
+        .pipe(dest('dist'))
+}
+
+exports.default = parallel(minify);