fix CI

Author: tushushu

ulist/python/ulist/ulist.pyi

@@ -265,6 +265,7 @@ class StringList:
     def size(self) -> int: ...
     def sort(self, ascending: bool) -> None: ...
     def starts_with(self, elem: str) -> BooleanList: ...
+    def str_len(self) -> IntegerList64: ...
     def to_list(self) -> List[Optional[str]]: ...
     def union_all(self, other: LIST_RS) -> LIST_RS: ...
     def unique(self) -> StringList: ...

ulist/src/string.rs

@@ -136,6 +136,12 @@ impl StringList {
         BooleanList::new(vec, HashSet::new())
     }
 
+    pub fn str_len(&self) -> IntegerList64 {
+        let mut vec = self.values().iter().map(|x| x.len() as i64).collect();
+        _fill_na(&mut vec, self.na_indexes(), 0);
+        IntegerList64::new(vec, self.na_indexes().clone())
+    }
+
     pub fn to_list(&self) -> Vec<Option<String>> {
         List::to_list(self)
     }