Fix pyproject.toml file to be PEP 518 compliant

pyproject.toml

@@ -9,13 +9,22 @@ version = "0.2.dev0"
 dependencies = [
   'poetry-core>=1.0.0'
 ]
+dynamic = [
+  "readme"
+]
 
 [tool.mypy]
 ignore_missing_imports = true
 strict = true
 warn_unreachable = true
 enable_error_code = ["ignore-without-code", "redundant-expr", "truthy-bool"]
 
+[tool.poetry]
+name = "sphinx-all-contributors"
+readme = "README.md"
+authors = ["Tetsuo Koyama"]
+description = "all-contributors for Sphinx users"
+
 [tool.pytest.ini_options]
 minversion = "6.0"
 addopts = ["-ra", "--showlocals", "--strict-markers", "--strict-config"]