405 back reload token with synctokens (#436)

* [#405] added syncToken in calendar params and fetch with sync token

* [#405] changed reload to work with sync-token

* [#405] fixup promise handling, added calendar adding and removing hanlding with refresh

* [#405]  fixed event expansion calls

* [#405 & refactor] added helperfunction to get base event uid + refactored synctoken updates management

* [#405] added pMap lib to process event expansion

* [#405] added flag for no synctoken / new synctoken

package.json

@@ -24,6 +24,7 @@
     "moment": "^2.30.1",
     "moment-timezone": "^0.5.48",
     "openid-client": "^6.5.3",
+    "p-map": "^7.0.4",
     "react": "^18.2.0",
     "react-colorful": "^5.6.1",
     "react-dom": "^18.2.0",