Updated stable branch to revision 2.18.4
diff --git a/Formula/dart.rb b/Formula/dart.rb
index 1353fae..64b0e00 100644
--- a/Formula/dart.rb
+++ b/Formula/dart.rb
@@ -34,26 +34,26 @@
 
   conflicts_with "dart-beta", because: "dart-beta ships the same binaries"
   if OS.mac? && Hardware::CPU.intel?
-    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.3/sdk/dartsdk-macos-x64-release.zip"
-    sha256 "52ba7072694f7d782633274440fe717c6ac300d4ba4fdbc24bdcd2bae77f4995"
+    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.4/sdk/dartsdk-macos-x64-release.zip"
+    sha256 "350b9150b95d78405942e2d75aa7b4c7f2ed9fdd828bea39f1f6c069d3470fa5"
   elsif OS.mac? && Hardware::CPU.arm?
-    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.3/sdk/dartsdk-macos-arm64-release.zip"
-    sha256 "7295fb2159879aca7dc829be9b123e24d18812ee7108894da5d521724e8e278f"
+    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.4/sdk/dartsdk-macos-arm64-release.zip"
+    sha256 "2a6b49eb9285bd81d9b17b273db303b274f2de95e74171a2031f42c18abc9dc9"
   elsif OS.linux? && Hardware::CPU.intel?
     if Hardware::CPU.is_64_bit?
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.3/sdk/dartsdk-linux-x64-release.zip"
-      sha256 "77ffe06da481ce420463349d339998dcb122f8c7a857ab96acd35a4652d47e3d"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.4/sdk/dartsdk-linux-x64-release.zip"
+      sha256 "945c3e29ac7386e00c9eeeb2a5ccc836acb0ce9883fbc29df82fd41c90eb3bd6"
     else
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.3/sdk/dartsdk-linux-ia32-release.zip"
-      sha256 "158facce774258859f5c7a51bda65b981c182fa11a028c154ff032b1302d6add"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.4/sdk/dartsdk-linux-ia32-release.zip"
+      sha256 "a9bfb23d590cc22fdd349d2803bdad463a97f5d75853217e030cb2ea37fb3315"
     end
   elsif OS.linux? && Hardware::CPU.arm?
     if Hardware::CPU.is_64_bit?
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.3/sdk/dartsdk-linux-arm64-release.zip"
-      sha256 "e7ddd9e8c7160b72f61af674e8715f01df4ad445a92685cf86f7b0701fb44027"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.4/sdk/dartsdk-linux-arm64-release.zip"
+      sha256 "b279454d8e2827800b18b736d745126c8d99ffffdcc752156145a6ed5a39cf62"
     else
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.3/sdk/dartsdk-linux-arm-release.zip"
-      sha256 "0e5f0f3bf591bbc0a8561171ebfdba3a2da566600d4fcdd6bd6a614201c304e0"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.18.4/sdk/dartsdk-linux-arm-release.zip"
+      sha256 "746c3e134598341d1d71680725eb9289a402c6621cae55ae48758e0bad3f7849"
     end
   end