Add 2.14 formula (#104)

diff --git a/Formula/dart@2.14.rb b/Formula/dart@2.14.rb
new file mode 100644
index 0000000..53cf708
--- /dev/null
+++ b/Formula/dart@2.14.rb
@@ -0,0 +1,52 @@
+# typed: false
+# frozen_string_literal: true
+
+class DartAT214 < Formula
+  desc "Dart SDK"
+  homepage "https://dart.dev"
+
+  keg_only :versioned_formula
+  if OS.mac?
+    url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.14.4/sdk/dartsdk-macos-x64-release.zip"
+    sha256 "c900f6ccb62e2f7526f457d00be8fc296e7c2ce9c7653cf007b5a4db7fe9a9ae"
+  elsif OS.linux? && Hardware::CPU.intel?
+    if Hardware::CPU.is_64_bit?
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.14.4/sdk/dartsdk-linux-x64-release.zip"
+      sha256 "49b6a98008ef546cb9c221461529d6c02cf2474bff098e0dc7e4ff1ef0f8a289"
+    else
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.14.4/sdk/dartsdk-linux-ia32-release.zip"
+      sha256 "f6b73006af2e3bd1394877f2e539ef88ae6a93968a56d4124e3b0b5d68b4de36"
+    end
+  elsif OS.linux? && Hardware::CPU.arm?
+    if Hardware::CPU.is_64_bit?
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.14.4/sdk/dartsdk-linux-arm64-release.zip"
+      sha256 "0477fae6fcff58fec18d912537f13d647fa0e137fce23401eea73102dce62351"
+    else
+      url "https://storage.googleapis.com/dart-archive/channels/stable/release/2.14.4/sdk/dartsdk-linux-arm-release.zip"
+      sha256 "796b64022615ea75f05f20a3d5e7018e52a1d26c06acb1d2b0b2faa5df491a64"
+    end
+  end
+
+  def install
+    libexec.install Dir["*"]
+    bin.install_symlink "#{libexec}/bin/dart"
+    bin.write_exec_script Dir["#{libexec}/bin/{pub,dart?*}"]
+  end
+
+  def caveats
+    <<~EOS
+      Please note the path to the Dart SDK:
+        #{opt_libexec}
+    EOS
+  end
+
+  test do
+    (testpath/"sample.dart").write <<~EOS
+      void main() {
+        print(r"test message");
+      }
+    EOS
+
+    assert_equal "test message\n", shell_output("#{bin}/dart sample.dart")
+  end
+end