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/docs/conf.py b/docs/conf.py
index 22f4bc1..95639c1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -18,7 +18,7 @@
# -- Project information -----------------------------------------------------
project = u'ndn-cxx: NDN C++ library with eXperimental eXtensions'
-copyright = u'Copyright © 2013-2021 Regents of the University of California.'
+copyright = u'Copyright © 2013-2022 Regents of the University of California.'
author = u'Named Data Networking Project'
# The short X.Y version.