nghttp2: Update version from 1.23.1 to 1.35.0

See the [releases][1] page for a change-log.

*   build: cmake: Fix libevent version detection (Patch from Jan Kundrát) (GH-1238)
*   lib: Use __has_declspec_attribute for shared builds (Patch from Don) (GH-1222)
*   src: Require C++14 language feature
*   nghttpx: Write mruby send_info early
*   nghttpx: Fix assertion failure on mruby send_info with HTTP/1 frontend
*   h2load: Handle HTTP/1 non-final response (GH-1259)
*   h2load: Clarify that time for connect includes TLS handshake

[1]:  https://github.com/nghttp2/nghttp2/releases

nghttp2.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION nghttp2-1.23.1-0
+# BEE_VERSION nghttp2-1.35.0-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)