component/pandas: fix versions

version 0.25.3 is not python2 compatible.

Use version 0.24.2 as it is compatible with both python2 and python3.7
(even though we have no reason to use python3.7 nowadays).
See https://pypi.org/project/pandas/0.24.2/

component/pandas/buildout.cfg

@@ -15,13 +15,14 @@ egg = pandas
 environment = pandas-env
 setup-eggs =
   ${numpy:egg}
-
-[pandas:sys.version_info >= (3,8)]
-setup-eggs +=
   ${cython:egg}
 
 [versions]
-pandas = 0.25.3
-
-[versions:sys.version_info >= (3,8)]
 pandas = 1.4.0
+
+[pandas:sys.version_info < (3,8)]
+setup-eggs =
+  ${numpy:egg}
+
+[versions:sys.version_info < (3,8)]
+pandas = 0.24.2