fix CI errors (7)

7 jobs for pybind11 in 12 minutes and 3 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build Gcc Nocheck
passed job_build_gcc_nocheck #6768

00:01:32

 
  Test Gcc Nocheck
passed job_test_gcc_nocheck #6769

00:00:18

 
  Build Clang
passed job_build_clang #6770

00:02:11

 
  Test Clang
passed job_test_clang #6771

00:00:15

 
  Code Coverage
passed job_code_coverage #6772

00:05:12

76.278%
 
  Build Python
passed job_build_python #6773

00:02:32

 
  Test Python
failed job_test_python #6774

00:00:01

 
Name Stage Failure
failed
job_test_python Test Python
Downloading artifacts from coordinator... ok        id=6773 responseStatus=200 OK token=yvahT5TK
Running before_script and script
$ python3 -c "import xerus; assert xerus.__version__ == \"$(cat VERSION)\""
Traceback (most recent call last):
File "<string>", line 1, in <module>
AttributeError: module 'xerus' has no attribute '__version__'
Running after_script
Uploading artifacts for failed job
ERROR: Job failed: exit status 1