Fix parsing paths from config file. (#180)

Author: tobiasraabe

docs/source/changes.rst

@@ -24,6 +24,7 @@ all releases are available on `PyPI <https://pypi.org/project/pytask>`_ and
   about the number of successes, fails and other status.
 - :gh:`178` makes some stylistic changes like reducing tasks ids even more and dims the
   path part.
+- :gh:`180` fixes parsing relative paths from the configuration file.
 
 
 0.1.3 - 2021-11-30

src/_pytask/config.py

@@ -96,7 +96,9 @@ def pytask_configure(
 
     # If paths are set in the configuration, process them.
     if config_from_file.get("paths"):
-        paths_from_file = parse_value_or_multiline_option(config_from_file.get("paths"))
+        paths_from_file = to_list(
+            parse_value_or_multiline_option(config_from_file.get("paths"))
+        )
         config_from_file["paths"] = [
             config["config"].parent.joinpath(p).resolve() for p in paths_from_file
         ]