add missing dependencies

installer/debian/simple-signer/DEBIAN/control

@@ -1,8 +1,8 @@
 Package: Simple-Signer
-Version: 1.5.4-2
+Version: 1.5.4-3
 Section: base
 Priority: optional
 Architecture: all
-Depends: python3, python3-venv, python3-pip, python3-setuptools, python3-asn1crypto, python3-cryptography, python3-pyqt5, python3-pil, swig
+Depends: python3, python3-venv, python3-pip, python3-setuptools, python3-asn1crypto, python3-cryptography, python3-pyqt5, python3-pil, swig, libjpeg-dev, zlib1g-dev
 Maintainer: Georg Sieber <[email protected]>
 Description: Sign and certity PDF files using a simple user interface.

requirements.txt

@@ -3,6 +3,7 @@ PyMuPDF
 
 # pin pillow to <=9.5.0 as long as PyQt5 is used to avoid
 # "cannot import name 'ImageQt' from 'PIL.ImageQt'"
+# needs: libjpeg-dev zlib1g-dev
 pillow<=9.5.0
 
 # Debian package note: since python3-pyqt5 is a build-dependency and --use-system-packages is set,