Prepare release 0.7.1

refs #5129

Change-Id: Idb9c7ccbf764be3d61b9a58dd0bd4ecfca5c63d5
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index b9baebb..dda6baf 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,12 @@
 # Release Notes
 
+## Version 0.7.1
+
+The build requirements have been increased to require Clang >= 4.0, Xcode >= 9.0, and Python >= 3.6.
+Meanwhile, it is *recommended* to use GCC >= 7.4.0 and Boost >= 1.65.1.
+
+This release contains minor build fixes and code cleanups.
+
 ## Version 0.7
 
 chunks: