Add some more metadata

Signed-off-by: James Morris <jamesmorris2@gmail.com>

pyproject.toml

@@ -1,6 +1,9 @@
 [project]
 name = "git-filter-repo"
 description = "Quickly rewrite git repository history"
+authors = [
+    {name = "Elijah Newren", email = "newren@gmail.com"}
+]
 readme = "README.md"
 classifiers = [
     "Development Status :: 4 - Beta",
@@ -11,6 +14,10 @@ classifiers = [
     "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",