Add more project URLs in PyPI

Author: haplo

setup.cfg

@@ -7,6 +7,10 @@ description = Black plugin for the Python LSP Server
 url = https://github.com/python-lsp/python-lsp-black
 long_description = file: README.md
 long_description_content_type = text/markdown
+project_urls =
+    Bug Tracker = https://github.com/python-lsp/python-lsp-black/issues
+    Changelog = https://github.com/python-lsp/python-lsp-black/blob/master/CHANGELOG.md
+    Source Code = https://github.com/python-lsp/python-lsp-black
 classifiers =
     Programming Language :: Python
     License :: OSI Approved :: MIT License