Add test dependencies

2 jobs for ci_tests in 0 seconds
Name Stage Failure
test:latest Test
Checking out e2c03d4c as ci_tests...
Skipping Git submodules setup
Executing "step_script" stage of the job script
$ pwd
$ julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=".")); Pkg.instantiate(); Pkg.test("MarkovProcesses")'
bash: line 122: julia: command not found
Cleaning up project directory and file based variables
ERROR: Job failed: exit status 1