Update saas packages for node 16

package.json

@@ -67,7 +67,7 @@
     "memoize-one": "5.1.1",
     "moment": "2.24.0",
     "ng-annotate-webpack-plugin": "0.3.0",
-    "node-sass": "4.13.1",
+    "node-sass": "^7.0.1",
     "prop-types": "15.7.2",
     "react": "16.12.0",
     "react-dom": "16.12.0",
@@ -77,7 +77,7 @@
     "react-transition-group": "4.3.0",
     "rst2html": "github:thoward/rst2html#990cb89",
     "rxjs": "6.6.3",
-    "sass-loader": "8.0.2",
+    "sass-loader": "10.2.1",
     "semver": "^7.3.2",
     "style-loader": "1.1.3",
     "tether-drop": "^1.4.2",