helper.rb in http-2-0.6.3

- old
+ new

@@ -1,7 +1,11 @@
 require 'http/2'
+require 'json'
+require 'coveralls'
 
+Coveralls.wear! if ENV["CI"]
+
 include HTTP2
 include HTTP2::Header
 include HTTP2::Error
 
 DATA = {
@@ -89,10 +93,10 @@
   DATA, HEADERS, PRIORITY, RST_STREAM, SETTINGS, PUSH_PROMISE,
   PING, GOAWAY, WINDOW_UPDATE, CONTINUATION
 ]
 
 def set_stream_id(bytes, id)
-  head = bytes.slice!(0,8).unpack("SCCL")
+  head = bytes.slice!(0,8).unpack('nCCN')
   head[3] = id
 
-  head.pack("SCCL") + bytes
+  head.pack('nCCN') + bytes
 end