Moving import to top fixes segfault

But then again, this can result to conflicts between package maintainers
who all claim the top lines for importing.

Also, I've not tested if everything as in _everything_ still works:
adding images to the pdfarranger doc and signing it using pyHanko works.

pdfarranger/pdfarranger.py

@@ -14,6 +14,10 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
+print('Testing imports')
+from pyhanko.pdf_utils.barcodes import PdfStreamQRImage
+from pyhanko.pdf_utils.images import PdfImage
+
 import os
 import shutil  # for file operations like whole directory deletion
 import sys  # for processing of command line args
@@ -2024,9 +2028,6 @@ def sign_pdf(self, _action, _parameter, _unknown):
         2. ask for a coordinate to put the signature;
         3. save the document as a new PDF file and sign it using pyHanko.
         """
-        print('Testing imports')
-        from pyhanko.pdf_utils.barcodes import PdfStreamQRImage
-        from pyhanko.pdf_utils.images import PdfImage
 
         # Check for pyHanko
         try: