feat: isUndefined returns a type predicate to play nice with typescript

Author: alcercu

web/src/utils/index.ts

@@ -1,9 +1 @@
-export const notUndefined = (maybeObjects: any[] | any): boolean =>
-  Array.isArray(maybeObjects)
-    ? maybeObjects.reduce((acc, maybeObject) =>
-        acc && _notUndefined(maybeObject) ? true : false
-      )
-    : _notUndefined(maybeObjects);
-
-const _notUndefined = (maybeObject: any): boolean =>
-  typeof maybeObject !== "undefined";
+export const isUndefined = (maybeObject: any): maybeObject is undefined => typeof maybeObject === "undefined";