Add objc-runtime-tools

Author: web-flow

packages.json

@@ -1915,6 +1915,7 @@
   "https://github.com/davbeck/PersistentCacheKit.git",
   "https://github.com/davbeck/swift-glob.git",
   "https://github.com/davdroman/MultiModal.git",
+  "https://github.com/davdroman/objc-runtime-tools.git",
   "https://github.com/davdroman/PeriodDuration.git",
   "https://github.com/davdroman/PreciseDecimal.git",
   "https://github.com/davdroman/swift-builders.git",