Update .gitlab-ci.yml

1 job for master in 13 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #133
particle-lib
test-basic

00:00:13

 
Name Stage Failure
failed
test-basic Test
Removing build/
HEAD is now at 502ae51 Update .gitlab-ci.yml
From https://gitlab.blaschke.science/microswimmer/particle-lib
502ae51..2df45fd master -> origin/master
Checking out 2df45fdb as master...
Skipping Git submodules setup
/bin/bash: line 60: sudo: command not found
$ sudo apt install gcc g++ mpich cmake
ERROR: Job failed: exit code 1