Create rule S5869[javascript]: Character classes in regular expressions should not contain the same character twice (#267)

rules/S5869/javascript/metadata.json

@@ -0,0 +1,3 @@
+{
+
+}

rules/S5869/javascript/rule.adoc

@@ -0,0 +1,16 @@
+include::../description.adoc[]
+
+== Noncompliant Code Example
+
+----
+/[0-99]/ // Noncompliant, this won't actually match strings with two digits
+/[0-9.-_]/ // Noncompliant, .-_ is a range that already contains 0-9 (as well as various other characters such as capital letters)
+----
+
+
+== Compliant Solution
+
+----
+/[0-9]{1,2}/
+/[0-9.\-_]/
+----

rules/S5869/metadata.json

@@ -12,7 +12,9 @@
   "extra": {
     "coveredLanguages": [
       "Java",
-      "PHP"
+      "PHP",
+      "JavaScript",
+      "TypeScript"
     ],
     "replacementRules": [