Fix pyproject.toml format

Fix pyproject format to correctly build with poetry-core 2.0.0

pyproject.toml

@@ -2,18 +2,18 @@
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
-[tool.poetry]
-name = "pyrad"
-version= "2.4"
-readme = "README.rst"
-license = "BSD-3-Clause"
-description="RADIUS tools"
-authors = [
-  "Istvan Ruzman <[email protected]>",
-  "Christian Giese <[email protected]>",
-]
-keywords = ["AAA", "accounting", "authentication", "authorization", "RADIUS"]
-classifiers = [
+[project]
+ name = "pyrad"
+ version= "2.4"
+ readme = "README.rst"
+ license = "BSD-3-Clause"
+ description="RADIUS tools"
+ authors = [
+  { name = "Istvan Ruzman", email = "[email protected]" },
+  { name = "Christian Giese", email = "[email protected]" },
+ ]
+ keywords = ["AAA", "accounting", "authentication", "authorization", "RADIUS"]
+ classifiers = [
     "Development Status :: 6 - Mature",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: BSD License",
@@ -31,11 +31,11 @@ include = [
   "example/*"
 ]
 
-[tool.poetry.urls]
+[project.urls]
 repository = "https://github.com/pyradius/pyrad"
 
 [tool.poetry.dependencies]
 python = "^3.6"
 
-[tool.poetry.dev-dependencies]
+[tool.poetry.group.dev-dependencies]
 nose = "^0.10.0b1"