* [x] upgrade to go `1.16.4` and pull in changes from libbeat * [x] upgrade to go `1.16.5` (https://github.com/elastic/beats/issues/26182) and pull in changes from libbeat * [x] update [support matrix](https://www.elastic.co/support/matrix#matrix_os) to reflect that `OSX <10.14` is not supported for apm-server >= `7.14`.
1.16.4and pull in changes from libbeat1.16.5(Update to golang 1.16.5/1.15.13 beats#26182) and pull in changes from libbeatOSX <10.14is not supported for apm-server >=7.14.