fix: update version to 2.0.0rc1 and adjust license format in pyproject.toml

Author: cak

pyproject.toml

@@ -4,16 +4,16 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "secure"
-version = "2.0.0"
+version = "2.0.0rc1"
 description = "A lightweight package that adds security headers for Python web frameworks."
 readme = { file = "README.md", content-type = "text/markdown" }
-license = "MIT"
+license = { text = "MIT" }
 license-files = ["LICENSE"]
 authors = [{ name = "Caleb Kinney", email = "caleb@typeerror.com" }]
 requires-python = ">=3.10"
 keywords = ["security", "headers", "web", "framework", "HTTP"]
 classifiers = [
-  "Development Status :: 5 - Production/Stable",
+  "Development Status :: 4 - Beta",
   "Intended Audience :: Developers",
   "Operating System :: OS Independent",
   "Programming Language :: Python :: 3",