test: fix testsuite name detection for older python versions

WE use a regex now instead of directly checking for a string

tests/test_cli.py

@@ -2,6 +2,7 @@
 import pytest
 from junitparser import cli
 from junitparser import version
+import re
 
 DATA_DIR = Path(__file__).parent / "data"
 
@@ -21,7 +22,7 @@ def test_merge(tmp_path: Path):
     cli.merge(files, str(outfile))
     xml = outfile.read_text()
     for s in suites:
-        assert f'testsuite name="{s}"' in xml
+        assert re.match(f'testsuite[^>]*name="{s}"', xml)
 
 
 def test_merge_output_to_terminal(capsys: pytest.CaptureFixture):