Add HPACK test cases

fixtures/hpack/go-hpack/story_01.json

@@ -0,0 +1,58 @@
+{
+  "description": "https://github.com/Jxck/hpack implemeted in Golang. Encoded using String Literal with Huffman, no Header/Static Table, and always start with emptied Reference Set. by Jxck.",
+  "cases": [
+    {
+      "seqno": 0,
+      "header_table_size": 4096,
+      "wire": "0085b8824e5a4b849d29ad1f0088b83b5339ec327d7f882f91d35d055c87a70084b958d33f81630085b9495339e483c5837f0087b505b161cc5a93879eb193aac92a13008421cfd4c587f3e7cf9f3e7c870086f2b4e5a283ff84f07b2893",
+      "headers": [
+        {
+          ":scheme": "https"
+        },
+        {
+          ":authority": "example.com"
+        },
+        {
+          ":path": "/"
+        },
+        {
+          ":method": "GET"
+        },
+        {
+          "user-agent": "hpack-test"
+        },
+        {
+          "cookie": "xxxxxxx1"
+        },
+        {
+          "x-hello": "world"
+        }
+      ]
+    },
+    {
+      "seqno": 1,
+      "header_table_size": 4096,
+      "wire": "0085b8824e5a4b849d29ad1f0088b83b5339ec327d7f882f91d35d055c87a70084b958d33f81630085b9495339e483c5837f0087b505b161cc5a93879eb193aac92a13008421cfd4c587f3e7cf9f3e7c8b",
+      "headers": [
+        {
+          ":scheme": "https"
+        },
+        {
+          ":authority": "example.com"
+        },
+        {
+          ":path": "/"
+        },
+        {
+          ":method": "GET"
+        },
+        {
+          "user-agent": "hpack-test"
+        },
+        {
+          "cookie": "xxxxxxx2"
+        }
+      ]
+    }
+  ]
+}