use certifi to provide ssl certs if missing

requirements.txt

@@ -8,4 +8,5 @@ pefile==2019.4.18
 PyInstaller==3.4
 PyQt5==5.9.2
 https://github.com/danthedeckie/simpleeval/archive/41c99b8e224a7a0ae0ac59c773598fe79a4470db.zip
-sip==4.19.8
+sip==4.19.8
+certifi

src/main/python/main.py

@@ -1,4 +1,11 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
+import ssl
+import certifi
+import os
+
+if ssl.get_default_verify_paths().cafile is None:
+    os.environ['SSL_CERT_FILE'] = certifi.where()
+
 import traceback
 
 from PyQt5 import QtWidgets, QtCore