handle trailing commas while removing packages from at CI "oldest" tests

Author: AbanoubGhadban

script/convert

@@ -26,12 +26,15 @@ gsub_file_content("../package.json", /"eslint-plugin-jest": "[^"]*",/, "")
 gsub_file_content("../package.json", /"globals": "[^"]*",/, "")
 gsub_file_content("../package.json", /"knip": "[^"]*",/, "")
 gsub_file_content("../package.json", /"publint": "[^"]*",/, "")
-gsub_file_content("../package.json", /"typescript-eslint": "[^"]*",/, "")
+gsub_file_content("../package.json", /"typescript-eslint": "[^"]*",?/, "")
 gsub_file_content("../package.json", %r{"@arethetypeswrong/cli": "[^"]*",}, "")
 gsub_file_content("../package.json", %r{"@eslint/compat": "[^"]*",}, "")
 gsub_file_content("../package.json", %r{"@testing-library/dom": "[^"]*",}, "")
 gsub_file_content("../package.json", %r{"@testing-library/react": "[^"]*",}, "")
 
+# Clean up any trailing commas before closing braces
+gsub_file_content("../package.json", /,(\s*})/, "\\1")
+
 # Switch to the oldest supported React version
 gsub_file_content("../package.json", /"react": "[^"]*",/, '"react": "16.14.0",')
 gsub_file_content("../package.json", /"react-dom": "[^"]*",/, '"react-dom": "16.14.0",')