Merge #11793: Docs: Bump OS X version to 10.13

543ab40 Docs: Bump OSX version to 10.13 in build-osx.md (Varunram Ganesh)

Pull request description:

  Core works fine on macOS 10.13

Tree-SHA512: 44807920e3d5518c98d68191ed614019934bb702df9695389f8178a00a7c5afccd90fad68a07568cdc3e3d04068bddf434942fb81dceb6cbde9bb4ff4e49e425

Author: laanwj

doc/build-osx.md

@@ -110,6 +110,6 @@ Uncheck everything except Qt Creator during the installation process.
 Notes
 -----
 
-* Tested on OS X 10.8 through 10.12 on 64-bit Intel processors only.
+* Tested on OS X 10.8 through 10.13 on 64-bit Intel processors only.
 
 * Building with downloaded Qt binaries is not officially supported. See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714)