build(pyproject): add metadata

pyproject.toml

@@ -2,8 +2,21 @@
 name = "Remarshal"
 version = "0.15.1"
 description = "Convert between CBOR, JSON, MessagePack, TOML, and YAML"
-authors = ["D. Bohdan"]
+authors = ["D. Bohdan <dbohdan@dbohdan.com>"]
 license = "MIT"
+readme = "README.md"
+homepage = "https://github.com/remarshal-project/remarshal"
+repository = "https://github.com/remarshal-project/remarshal"
+keywords = ["converter", "cbor", "json", "messagepack", "msgpack", "toml", "yaml"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: 3",
+    "Topic :: File Formats",
+    "Topic :: File Formats :: JSON",
+    "Topic :: Utilities"
+]
 
 [tool.poetry.dependencies]
 python = "^3.8"