install catch2 in Ubuntu 21.04 Docker image

Catch2 is going to be used to create test cases in upcoming commits.

diff --git a/ci/ubuntu-21.04/Dockerfile b/ci/ubuntu-21.04/Dockerfile
index 2393872a8329a8e336db7dbf42ca253a457b1904..3f8820a6e71312de79065de5a0156e59aaae4635 100644 (file)
--- a/ci/ubuntu-21.04/Dockerfile
+++ b/ci/ubuntu-21.04/Dockerfile
@@ -83,6 +83,7 @@ python3-pip \
 python3-setuptools \
 gcovr \
 # Libraries used in test
+catch2 \
 libboost-dev \
 libsvgpp-dev \
 # install Python dependencies