Fix project dependencies (#117)

Dependencies should be listed under `project`, not under `project.license`.
Installation of the current package on PyPI will not install any depedencies.

Author: dweindl

pyproject.toml

@@ -12,11 +12,6 @@ maintainers = [
     {name = "Frank T. Bergmann", email = "frank.thomas.bergmann@gmail.com"}
 ]
 description = "Graphical user interface for the PEtab format"
-
-[project.license]
-file = "LICENSE"
-
-
 dependencies = [
     "wheel",
     "pyside6",
@@ -30,6 +25,9 @@ dependencies = [
     "copasi-petab-importer"
 ]
 
+[project.license]
+file = "LICENSE"
+
 [build-system]
 requires = [
     "setuptools>=42",