Fix Set Keyframe node fails when path contains a subscript

The Set Keyframe node always fails when the path contains a subscript.
This is apparently due to a change in the AST python module, where slice
object values can be directly accessed through the value attribute.

CHANGELOG.md

@@ -30,6 +30,7 @@
 - Fixed incorrect loading of boolean mesh attribute.
 - Fixed *BMesh Mesh Data* not loading indices.
 - Fixed *Set Bevel Vertex Weight* and *Set Bevel Edge Weight* nodes for API changes.
+- Fixed *Set Keyframe* node failing when path contains a subscript.
 
 ### Changed
 

animation_nodes/utils/path.py

@@ -25,7 +25,7 @@ def getResolvedNestedPath(id_block, path):
 def parsePath(expression):
     def split_internal(value):
         if isinstance(value, ast.Subscript):
-            return split_internal(value.value) + [f'["{value.slice.value.s}"]']
+            return split_internal(value.value) + [f'["{value.slice.value}"]']
         elif isinstance(value, ast.Attribute):
             return split_internal(value.value) + [value.attr]
         elif isinstance(value, ast.Name):