[gobject-introspection] Replace calls to deprecated xml.etree.cElementTree

[Emmanuele Bassi <ebassi src gnome org>]

commit 8ceb23621d7e59718c1d512155aae8e8eb17db56
Author: Stephen Gallagher <sgallagh redhat com>
Date:   Thu Mar 26 15:17:37 2020 -0400

    Replace calls to deprecated xml.etree.cElementTree
    
    cElementTree was removed in Python 3.9 in favor of ElementTree,
    which has used a fast, native implementation since Python 3.3.
    
    Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1817649
    
    Signed-off-by: Stephen Gallagher <sgallagh redhat com>

 giscanner/gdumpparser.py | 2 +-
 giscanner/girparser.py   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/giscanner/gdumpparser.py b/giscanner/gdumpparser.py
index 1730fee5..e7ccf575 100644
--- a/giscanner/gdumpparser.py
+++ b/giscanner/gdumpparser.py
@@ -22,7 +22,7 @@ import os
 import sys
 import tempfile
 import subprocess
-from xml.etree.cElementTree import parse
+from xml.etree.ElementTree import parse
 
 from . import ast
 from . import message
diff --git a/giscanner/girparser.py b/giscanner/girparser.py
index 0a6c687b..35206a41 100644
--- a/giscanner/girparser.py
+++ b/giscanner/girparser.py
@@ -21,7 +21,7 @@
 import os
 
 from collections import OrderedDict
-from xml.etree.cElementTree import parse
+from xml.etree.ElementTree import parse
 
 from . import ast
 from .girwriter import COMPATIBLE_GIR_VERSION