Modify rule S1874: Add Dart language

rules/S1874/dart/metadata.json

@@ -0,0 +1,3 @@
+{
+  "title": "Code annotated as deprecated should not be used"
+}

rules/S1874/dart/rule.adoc

@@ -0,0 +1,19 @@
+== Why is this an issue?
+
+include::../description.adoc[]
+
+[source,dart]
+----
+@Deprecated("This function is deprecated, use newFunction instead", ReplaceWith("newFunction()"))
+void oldFunction() {
+    println("This is the old function.");
+}
+
+void newFunction() {
+    println("This is the new function.");
+}
+
+oldFunction() // Noncompliant: "oldFunction is deprecated"
+----
+
+include::../see.adoc[]