(try) to improve tooling

pyproject.toml

@@ -1,12 +1,11 @@
 [build-system]
-requires = ["poetry>=0.12"]
+requires = ["poetry>=1.0"]
 build-backend = "poetry.masonry.api"
 
 
 [tool.poetry]
 name = "pyrad3"
 version = "0.1.0"
-license = "MIT OR Apache-2.0"
 readme = "README.md"
 description = "RADIUS tools"
 keywords = ["AAA", "authentication", "authorization", "accounting", "RADIUS"]
@@ -14,6 +13,7 @@ authors = ["Istvan Ruzman <istvan@ruzman.eu>"]
 classifiers = [
   "Development Status :: 4 - Beta",
   "Intended Audience :: Developers",
+  "Intended Audience :: Telecommunications Industry",
   "License :: OSI Approved :: Apache Software License",
   "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3.7",
@@ -25,7 +25,6 @@ classifiers = [
 include = [
   "LICENSE-APACHE",
   "LICENSE-MIT",
-  "README.md",
 ]
 
 
@@ -38,7 +37,7 @@ python = "^3.7"
 
 
 [tool.poetry.dev-dependencies]
-black = "^19.3.10b0"
+black = { version = "^19.3.10b0", allow-prereleases = true }
 pytest = "^5.4"
 pytest-black = "^0.3.10"
 pytest-cov = "^2.10"