Add iterator-join feature

features/iterator-join.yml

@@ -0,0 +1,3 @@
+name: Iterator join
+description: "The `Iterator.prototype.join()` method concatenates all values from an iterator into a string without needing to materialize them into an array first."
+spec: https://github.com/tc39/proposal-iterator-join

features/iterator-join.yml.dist

@@ -0,0 +1,6 @@
+# Generated from: iterator-join.yml
+# Do not edit this file by hand. Edit the source file instead!
+
+status:
+  baseline: false
+  support: {}

scripts/specs.ts

@@ -243,6 +243,10 @@ const defaultAllowlist: allowlistItem[] = [
     [
         "https://github.com/whatwg/html/pull/9546",
         "Allowed because the <input type=\"checkbox\" switch> feature is not yet in a formal spec. Remove this exception when a formal spec is available."
+    ],
+    [
+        "https://github.com/tc39/proposal-iterator-join",
+        "Allowed because the iterator-join proposal is not yet part of ecma262."
     ]
 ];