Include more files in distributions (#4964)

* Include LICENSE files in distributions

* Use pep517 isolated builds

* Update the GH Actions workflow

setup.cfg

@@ -27,10 +27,14 @@ classifiers =
     Operating System :: POSIX :: Linux
     Programming Language :: Python :: 3.8
     Topic :: Communications :: Chat
+license_files =
+    LICENSE
+    redbot/**/*.LICENSE
 
 [options]
 packages = find_namespace:
 python_requires = >=3.8.1,<3.9
+include_package_data = True
 install_requires =
     aiohttp==3.7.3
     aiohttp-json-rpc==0.13.3
@@ -134,14 +138,3 @@ pytest11 =
 include =
     redbot
     redbot.*
-
-[options.package_data]
-* =
-    locales/*.po
-    **/locales/*.po
-    data/*
-    data/**/*
-    *.export
-    py.typed
-redbot.core.drivers.postgres =
-    *.sql