🔖(tokens) bump to 0.4.0

Minor Changes
- 7eac0bf: Suffix all sass maps with the `!default` map
- fb2fb3e: Do not generate sass sub maps

packages/tokens/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@openfun/cunningham-tokens",
   "private": false,
-  "version": "0.3.0",
+  "version": "0.4.0",
   "license": "MIT",
   "publishConfig": {
     "access": "public"