build: raise minimum build requirements
* Make gcc 7.4 and boost 1.65.1 hard dependencies, both are
available out-of-the-box on Ubuntu 18.04
* Require Xcode 10 on macOS but recommend 11.3 or later
* If using clang on non-Apple platforms, the minimum supported
version is now 6.0
Change-Id: I79c84a266741c9a66655da4fd467fe0d8218e8f0
diff --git a/tests/unit/util/ostream-joiner.t.cpp b/tests/unit/util/ostream-joiner.t.cpp
index 2eaf2f9..4c617fa 100644
--- a/tests/unit/util/ostream-joiner.t.cpp
+++ b/tests/unit/util/ostream-joiner.t.cpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2013-2020 Regents of the University of California.
+ * Copyright (c) 2013-2022 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
@@ -24,12 +24,7 @@
#include "tests/boost-test.hpp"
#include <numeric>
-
-#if BOOST_VERSION >= 105900
#include <boost/test/tools/output_test_stream.hpp>
-#else
-#include <boost/test/output_test_stream.hpp>
-#endif
namespace ndn {
namespace tests {