fix: type Class that was breaking python 3.8

pythermalcomfort/jos3_functions/parameters.py

@@ -12,6 +12,8 @@
 It sorts the parameters alphabetically by key and formats each line with the parameter's name, meaning, and unit.
 The resulting documentation string can be displayed or printed for user reference.
 """
+from typing import List
+
 import textwrap
 from dataclasses import dataclass
 from typing import ClassVar
@@ -34,7 +36,7 @@ class Default:
     posture: str = "standing"
     bmr_equation: str = "harris-benedict"
     bsa_equation: str = "dubois"
-    local_bsa: ClassVar[list[float]] = np.array(  # body surface area [m2]
+    local_bsa: ClassVar[List[float]] = np.array(  # body surface area [m2]
         [
             0.110,
             0.029,