Updated stable channel to version 2.19.3
diff --git a/Formula/dart.rb b/Formula/dart.rb
index 22f0bf7..d793ca8 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/2.19.2/sdk/dartsdk-macos-x64-release.zip"
-    sha256 "ce307ad4f711d71ed7199ce4e6f3b2b2c7456b3b26a132023b8b960d01e1a78a"
+    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.3/sdk/dartsdk-macos-x64-release.zip"
+    sha256 "9b44776fada33221228ce86ea4cb03a809bb9e16fff78eff429aaf234d7170a4"
   elsif OS.mac? && Hardware::CPU.arm?
-    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.2/sdk/dartsdk-macos-arm64-release.zip"
-    sha256 "b373aa4f838248d2c4bddf4774ce14bac468e621f8476986739526d6295bb26a"
+    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.3/sdk/dartsdk-macos-arm64-release.zip"
+    sha256 "dc2e0f7b8b15602cedbfaed01180628f40b2c14500af2db891816ae626a2602c"
   elsif OS.linux? && Hardware::CPU.intel?
     if Hardware::CPU.is_64_bit?
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.2/sdk/dartsdk-linux-x64-release.zip"
-      sha256 "326f6085aaf3a6733f3cf2eface18513afbd07c70e4068c4da9c6880161ddb2b"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.3/sdk/dartsdk-linux-x64-release.zip"
+      sha256 "93b5db66868b0a0fd7f3615f2ae279985430de57f5e925e498d35b7d79ab0747"
     else
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.2/sdk/dartsdk-linux-ia32-release.zip"
-      sha256 "2be2031d600b8be3c73ff9ed56c8b2c304c5440a62f1e5e3a15446e76e7e3471"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.3/sdk/dartsdk-linux-ia32-release.zip"
+      sha256 "0011b8070a5a78c560ce5e362508cc0859935ea3af3fe6b7fccb3847828e7a76"
     end
   elsif OS.linux? && Hardware::CPU.arm?
     if Hardware::CPU.is_64_bit?
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.2/sdk/dartsdk-linux-arm64-release.zip"
-      sha256 "4c6f5139bde79f557af92790d219e64f1a2e043a657848e5618efbcb82f9b77e"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.3/sdk/dartsdk-linux-arm64-release.zip"
+      sha256 "af6e4aa9a146aab0844bca502c3bb3ebad33895d78f48743ff3513a7ef3dd163"
     else
-      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.2/sdk/dartsdk-linux-arm-release.zip"
-      sha256 "d3fddaabce691a316a2e3eb8c51f2bd46f53f073cf0e38b525cfc404f0a0d72c"
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.19.3/sdk/dartsdk-linux-arm-release.zip"
+      sha256 "7f0d6dc9d79dc5168ce3000389b91039b1273104546eee6104d1e428e12fe72c"
     end
   end