Merge pull request #1797 from pSchlarb/ubuntu-20.04-upgrade

updated plenum dependency

Author: pSchlarb

Diff for: setup.py

@@ -57,7 +57,7 @@
 
     # Update ./build-scripts/ubuntu-xxxx/build-3rd-parties.sh when this list gets updated.
     # - Excluding changes to indy-plenum.
-    install_requires=['indy-plenum==1.13.1.rc3',
+    install_requires=['indy-plenum==1.13.1.rc4',
                     # importlib-metadata needs to be pinned to 3.10.1 because from v4.0.0 the package
                     # name ends in python3-importlib-metadata_0.0.0_amd64.deb
                     # see also build-scripts/ubuntu-2004/build-3rd-parties.sh