upgrade flatbuffers to 1.6.0 (#345)

src/common/cmake/Common.cmake

@@ -5,7 +5,7 @@ include(CMakeParseArguments)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
 
-set(FLATBUFFERS_VERSION "1.3.0")
+set(FLATBUFFERS_VERSION "1.6.0")
 
 set(FLATBUFFERS_PREFIX "${CMAKE_BINARY_DIR}/flatbuffers_ep-prefix/src/flatbuffers_ep-install")
 if (NOT TARGET flatbuffers_ep)

src/numbuf/thirdparty/download_thirdparty.sh

@@ -11,4 +11,4 @@ if [ ! -d $TP_DIR/arrow ]; then
   git clone https://github.com/pcmoritz/arrow.git "$TP_DIR/arrow"
 fi
 cd "$TP_DIR/arrow"
-git checkout c88bd70c13cf16c07b840623cb466aa98d535be0
+git checkout a4a5526e4a8fbc4e4d5382a5c806ec871d2fbd9f