feat: add ncurses to Docker image

Author: dlorch

Dockerfile

@@ -4,7 +4,7 @@ FROM bash:${bashver}
 
 # Install parallel and accept the citation notice (we aren't using this in a
 # context where it make sense to cite GNU Parallel).
-RUN apk add --no-cache parallel && \
+RUN apk add --no-cache parallel ncurses && \
     mkdir -p ~/.parallel && touch ~/.parallel/will-cite
 
 RUN ln -s /opt/bats/bin/bats /usr/sbin/bats