Fix failing subsequent builds by upgrading to Gulp 4.x - Fixes #241 (#1113)

Signed-off-by: Rogier Hofboer <rogier@hofboer.nl>

bundles/org.openhab.ui.basic/gulpfile.js

@@ -48,5 +48,5 @@
 			.pipe(gulp.dest("./src/main/resources/web"));
 	});
 
-	gulp.task("default", [ "css", "copyFontLibs", "eslint", "js" ]);
+	gulp.task("default", gulp.parallel("css", "copyFontLibs", gulp.series("eslint", "js")));
 })();

bundles/org.openhab.ui.basic/npm-shrinkwrap.json

@@ -1,7 +0,0 @@
-{
-  "dependencies": {
-    "graceful-fs": {
-      "version": "4.2.3"
-    }
-  }
-}

bundles/org.openhab.ui.basic/package.json

@@ -6,11 +6,11 @@
     "build": "gulp default"
   },
   "dependencies": {
-    "gulp": "^3.9.0",
-    "gulp-eslint": "^4.0.0",
-    "gulp-sass": "^3.1.0",
-    "gulp-uglify": "^1.5.1",
-    "material-design-icons": "2.0.0",
-    "roboto-fontface": "0.4.3"
+    "gulp": "^4.0.2",
+    "gulp-eslint": "^6.0.0",
+    "gulp-sass": "^4.1.0",
+    "gulp-uglify": "^3.0.2",
+    "material-design-icons": "^3.0.1",
+    "roboto-fontface": "^0.10.0"
   }
 }