Update capnproto (close fffaraz#743)

README.md

@@ -487,7 +487,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 ## Inter-process communication
 
 * [Apache Thrift](https://thrift.apache.org/) - Efficient cross-language IPC/RPC, works between C++, Java, Python, PHP, C#, and many more other languages. Originally developed by Facebook. [Apache2]
-* [Cap'n Proto](http://kentonv.github.io/capnproto/) - Fast data interchange format and capability-based RPC system. [MIT]
+* [Cap'n Proto](https://github.com/capnproto/capnproto) - Fast data interchange format and capability-based RPC system. [MIT] [website](https://capnproto.org/)
 * [gRPC](https://github.com/grpc/grpc) - A high performance, open source, general-purpose RPC framework. [BSD] [website](http://www.grpc.io/)
 * [Ice](https://github.com/zeroc-ice/ice) - Comprehensive RPC framework with support for C++, C#, Java, JavaScript, Python and more. [GPLv2]
 * [libjson-rpc-cpp](https://github.com/cinemast/libjson-rpc-cpp) - JSON-RPC framework for C++ servers and clients. [MIT]
@@ -772,6 +772,7 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 ## Serialization
 
 * [Bond](https://github.com/Microsoft/bond) - An open source, cross-platform framework for working with schematized data. [MIT]
+* [Cap'n Proto](https://github.com/capnproto/capnproto) - Fast data interchange format and capability-based RPC system. [MIT] [website](https://capnproto.org/)
 * [cereal](https://github.com/USCiLab/cereal) - A C++11 library for serialization. [BSD]
 * [cppcodec](https://github.com/tplgy/cppcodec) - Header-only C++11 library to encode/decode base64, base32 and hex with consistent, flexible API. [MIT]
 * [FlatBuffers](https://github.com/google/flatbuffers) - A Memory efficient serialization library. [Apache2]