Merge commit '7b04dc15c5745e780ff19aaff3d43aa1c6c99ad6' into master

Upgrade flatbuffers to the latest.  It has been a while.

Change-Id: I6c56d742469591f31bd54243ec6d12c4cf397b26
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/third_party/flatbuffers/tests/BUILD.bazel b/third_party/flatbuffers/tests/BUILD.bazel
index 5a727dd..6c0ca22 100644
--- a/third_party/flatbuffers/tests/BUILD.bazel
+++ b/third_party/flatbuffers/tests/BUILD.bazel
@@ -1,5 +1,5 @@
 load("@rules_cc//cc:defs.bzl", "cc_test")
-load("//:build_defs.bzl", "flatbuffer_cc_library", "flatbuffer_ts_library")
+load("//:build_defs.bzl", "flatbuffer_cc_library")
 
 package(default_visibility = ["//visibility:private"])
 
@@ -8,20 +8,42 @@
     name = "flatbuffers_test",
     testonly = 1,
     srcs = [
+        "evolution_test.cpp",
+        "evolution_test.h",
         "evolution_test/evolution_v1_generated.h",
         "evolution_test/evolution_v2_generated.h",
+        "flexbuffers_test.cpp",
+        "flexbuffers_test.h",
+        "fuzz_test.cpp",
+        "fuzz_test.h",
+        "is_quiet_nan.h",
+        "json_test.cpp",
+        "json_test.h",
+        "monster_test.cpp",
+        "monster_test.h",
         "monster_test_bfbs_generated.h",
         "namespace_test/namespace_test1_generated.h",
         "namespace_test/namespace_test2_generated.h",
+        "native_inline_table_test_generated.h",
         "native_type_test_impl.cpp",
         "native_type_test_impl.h",
         "optional_scalars_generated.h",
+        "optional_scalars_test.cpp",
+        "optional_scalars_test.h",
+        "parser_test.cpp",
+        "parser_test.h",
+        "proto_test.cpp",
+        "proto_test.h",
+        "reflection_test.cpp",
+        "reflection_test.h",
         "test.cpp",
         "test_assert.cpp",
         "test_assert.h",
         "test_builder.cpp",
         "test_builder.h",
         "union_vector/union_vector_generated.h",
+        "util_test.cpp",
+        "util_test.h",
     ],
     copts = [
         "-DFLATBUFFERS_TRACK_VERIFIER_BUFFER_SIZE",
@@ -49,6 +71,8 @@
         ":name_clash_test/valid_test2.fbs",
         ":native_type_test.fbs",
         ":optional_scalars.fbs",
+        ":optional_scalars.json",
+        ":optional_scalars_defaults.json",
         ":prototest/imported.proto",
         ":prototest/test.golden",
         ":prototest/test.proto",