feat(ISV-5882): install root package in tox

We need the root mobster package to be installed in the test
environment, so we can use importlib.metadata to get the current Mobster
version.

Signed-off-by: Martin Jediny <jedinym@proton.me>

Author: jedinym

tox.ini

@@ -19,7 +19,7 @@ deps =
     poetry
     poetry-plugin-export
 commands_pre =
-    poetry install --no-root
+    poetry install
 setenv =
     PYTHONPATH = {toxinidir}/src