Make sure the version from pyproject.toml is reported on --version ca…

…lls.

README.adoc

@@ -32,14 +32,19 @@ It may also be a good idea to set up a virtual environment instead, to avoid ver
 
 E.g. like so:
 
-[source]
+[source, bash]
 ----
 mihxil@baleno:~$ python3 -m venv ~/venvs/pyapi-env
 mihxil@baleno:~$ source ~/venvs/pyapi-env/bin/activate
 (pyapi-env) mihxil@baleno:~$ pip3 install --upgrade  'git+https://github.com/npo-poms/pyapi.git'
 (pyapi-env) mihxil@baleno:~$ which npo_media_get
 /Users/mihxil/venvs/pyapi-env/bin/npo_media_get
+----
 
+To run tests also its dependencies must be installed
+[source, bash]
+----
+pip install -e .[testing]
 ----
 
 === Docker

src/npoapi/_version.py

@@ -1,4 +1,6 @@
-__version__ = "7.6.0.dev"
+from importlib.metadata import version
+
+__version__ = version("npoapi")
 
 # would this make pyxb work with python 3.10
 import collections