more upgrade steps for volto 16

jsconfig.json

@@ -3,14 +3,10 @@
     "jsx": "react",
     "paths": {
       "@eeacms/volto-circularity-policy": [
-        "develop/volto-circularity-policy/src"
+        "addons/volto-circularity-policy/src"
       ],
-      "@eeacms/volto-sustainability-theme": [
-        "develop/volto-sustainability-theme/src"
-      ],
-      "@eeacms/volto-plotlycharts": ["develop/volto-plotlycharts/src"],
-      "@eeacms/volto-object-widget": ["develop/volto-object-widget/src"],
-      "@eeacms/volto-quote-block": ["develop/volto-quote-block/src"]
+
+      "@eeacms/volto-plotlycharts": ["addons/volto-plotlycharts/src"]
     },
     "baseUrl": "src"
   }

package.json

@@ -53,8 +53,7 @@
     ],
     "transform": {
       "^.+\\.js(x)?$": "babel-jest",
-      "^.+\\.css$": "jest-css-modules",
-      "^.+\\.scss$": "jest-css-modules",
+      "^.+\\.less$": "jest-css-modules",
       "^.+\\.(png)$": "jest-file",
       "^.+\\.(jpg)$": "jest-file",
       "^.+\\.(svg)$": "./node_modules/@plone/volto/jest-svgsystem-transform.js"
@@ -67,6 +66,8 @@
       "@plone/volto/(.*)$": "<rootDir>/node_modules/@plone/volto/src/$1",
       "load-volto-addons": "<rootDir>/node_modules/@plone/volto/jest-addons-loader.js",
       "@package/(.*)$": "<rootDir>/src/$1",
+      "@plone/volto-slate": "<rootDir>/node_modules/@plone/volto/packages/volto-slate/src",
+      "\\.(css|less|scss|sass)$": "identity-obj-proxy",
       "@root/(.*)$": "<rootDir>/src/$1",
       "~/(.*)$": "<rootDir>/src/$1"
     },