android: fix crash when parsing calendar events

Upstream PR: https://github.com/wmcmahan/react-native-calendar-events/pull/268

package-lock.json

       "integrity": "sha512-cuXIIv+dcG8a8qkTD8pMzeqOEZCO+UGKglZWIe1osve+yJslmCowYQff+bI9xa7NOt2w+Vtd4L3d9JonlSqODg=="
     },
     "react-native-calendar-events": {
-      "version": "1.6.4",
-      "resolved": "https://registry.npmjs.org/react-native-calendar-events/-/react-native-calendar-events-1.6.4.tgz",
-      "integrity": "sha512-By4lgWQG9eewS9WzhzxVHAewxX40v1CzLnNYXFMOqF06fYVCNykiiTMGlLzz3UXHVwwN1Drxw9uWroQfGRFMsw=="
+      "version": "github:jitsi/react-native-calendar-events#f621cbe97b182cfaca41545fd6b818a85d632506",
+      "from": "github:jitsi/react-native-calendar-events#f621cbe97b182cfaca41545fd6b818a85d632506"
     },
     "react-native-callstats": {
       "version": "3.61.0",

package.json

     "react-linkify": "1.0.0-alpha",
     "react-native": "0.59.10",
     "react-native-background-timer": "2.1.1",
-    "react-native-calendar-events": "1.6.4",
+    "react-native-calendar-events": "github:jitsi/react-native-calendar-events#f621cbe97b182cfaca41545fd6b818a85d632506",
     "react-native-callstats": "3.61.0",
     "react-native-google-signin": "2.0.0",
     "react-native-immersive": "2.0.0",