FEATURE: allow distributed cache to handle Set as value

spec/components/distributed_cache_spec.rb

@@ -11,6 +11,34 @@ describe DistributedCache do
     DistributedCache.new("test")
   end
 
+  it 'allows us to store Set' do
+    c1 = DistributedCache.new("test1")
+    c2 = DistributedCache.new("test1")
+
+    set = {a: 1, b: 1}
+    set = Set.new
+    set << 1
+    set << "b"
+
+    c1["cats"] = set
+
+    wait_for do
+      c2["cats"] == set
+    end
+
+    expect(c2["cats"]).to eq(set)
+
+    set << 5
+
+    c2["cats"] == set
+
+    wait_for do
+      c1["cats"] == set
+    end
+
+    expect(c1["cats"]).to eq(set)
+  end
+
   it 'does not leak state across caches' do
     c2 = DistributedCache.new("test1")
     c3 = DistributedCache.new("test1")