fix test scripts for ruby 2.5 (DockerHub CI)?
fix test scripts for ruby 2.5 (DockerHub CI)?

https://github.com/goblint/analyzer/commit/aeef8302950f4b138092b7349cf5bd3a67050f2b#r50067939

goblint/analyzer,goblint/analyzer,goblint/analyzer,goblint/analyzer,goblint/analyzer