[gobject-introspection] Drop deprecated xml.etree.ElementTree.Element.getchildren() calls

[Emmanuele Bassi <ebassi src gnome org>]

commit 1f9284228092b2a7200e8a78bc0ea6702231c6db
Author: Miro Hrončok <miro hroncok cz>
Date:   Mon Jan 6 14:05:03 2020 +0100

    Drop deprecated xml.etree.ElementTree.Element.getchildren() calls
    
    The XML elements are implicitly iterable in all Python versions including
    at least 2.7 and 3.2+.
    
    The .getchildren() method is deprecated since 2.7 and 3.2, removed in 3.9.
    
    Fixes https://gitlab.gnome.org/GNOME/gobject-introspection/issues/325

 giscanner/girparser.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/giscanner/girparser.py b/giscanner/girparser.py
index 7687c35c..0a6c687b 100644
--- a/giscanner/girparser.py
+++ b/giscanner/girparser.py
@@ -75,17 +75,17 @@ class GIRParser(object):
 
     def _find_first_child(self, node, name_or_names):
         if isinstance(name_or_names, str):
-            for child in node.getchildren():
+            for child in node:
                 if child.tag == name_or_names:
                     return child
         else:
-            for child in node.getchildren():
+            for child in node:
                 if child.tag in name_or_names:
                     return child
         return None
 
     def _find_children(self, node, name):
-        return [child for child in node.getchildren() if child.tag == name]
+        return [child for child in node if child.tag == name]
 
     def _get_current_file(self):
         if not self._filename_stack:
@@ -103,7 +103,7 @@ class GIRParser(object):
             raise SystemExit("%s: Incompatible version %s (supported: %s)" %
                              (self._get_current_file(), version, COMPATIBLE_GIR_VERSION))
 
-        for node in root.getchildren():
+        for node in root:
             if node.tag == _corens('include'):
                 self._parse_include(node)
             elif node.tag == _corens('package'):
@@ -145,7 +145,7 @@ class GIRParser(object):
             parser_methods[_corens('function-macro')] = self._parse_function_macro
             parser_methods[_corens('function')] = self._parse_function
 
-        for node in ns.getchildren():
+        for node in ns:
             method = parser_methods.get(node.tag)
             if method is not None:
                 method(node)
@@ -413,7 +413,7 @@ class GIRParser(object):
     def _parse_fields(self, node, obj):
         res = []
         names = (_corens('field'), _corens('record'), _corens('union'), _corens('callback'))
-        for child in node.getchildren():
+        for child in node:
             if child.tag in names:
                 fieldobj = self._parse_field(child, obj)
                 res.append(fieldobj)