Updated less-loader and css-loader libraries

Signed-off-by: snipe <snipe@snipe.net>

package.json

@@ -36,7 +36,7 @@
         "bootstrap-less": "^3.3.8",
         "bootstrap-table": "1.20.2",
         "chart.js": "^2.9.4",
-        "css-loader": "^3.6.0",
+        "css-loader": "^4.0.0",
         "ekko-lightbox": "^5.1.1",
         "icheck": "^1.0.2",
         "imagemin": "^8.0.1",
@@ -47,7 +47,7 @@
         "jquery.iframe-transport": "^1.0.0",
         "jspdf-autotable": "^3.5.24",
         "less": "^4.1.2",
-        "less-loader": "^5.0.0",
+        "less-loader": "^6.0.0",
         "list.js": "^1.5.0",
         "papaparse": "^4.3.3",
         "select2": "4.0.13",