Set HTTP/2 protocol id to h2-13 for now

lib/includes/nghttp2/nghttp2.h

@@ -41,7 +41,7 @@ extern "C" {
  * The protocol version identification string of this library
  * supports.  This identifier is used if HTTP/2 is used over TLS.
  */
-#define NGHTTP2_PROTO_VERSION_ID "h2-12"
+#define NGHTTP2_PROTO_VERSION_ID "h2-13"
 /**
  * @macro
  *
@@ -56,7 +56,7 @@ extern "C" {
  * supports.  This identifier is used if HTTP/2 is used over cleartext
  * TCP.
  */
-#define NGHTTP2_CLEARTEXT_PROTO_VERSION_ID "h2c-12"
+#define NGHTTP2_CLEARTEXT_PROTO_VERSION_ID "h2c-13"
 
 /**
  * @macro

tests/nghttp2_npn_test.c

@@ -33,7 +33,7 @@ static void http2(void)
 {
   const unsigned char p[] = {
     8, 'h', 't', 't', 'p', '/', '1', '.', '1',
-    5, 'h', '2', '-', '1', '2',
+    5, 'h', '2', '-', '1', '3',
     6, 's', 'p', 'd', 'y', '/', '3'
   };
   unsigned char outlen;