Add zmq_timers support #154

Job	Run time
tests (ubuntu-20.04, 11, gcc-9, g++-9, OFF, 4.2.0, pkgconfig)	1s
tests (ubuntu-20.04, 11, gcc-10, g++-10, ON, 4.3.5, cmake)	1s
tests (ubuntu-20.04, 98, gcc-10, g++-10, ON, 4.3.5, cmake)	1s
tests (ubuntu-20.04, 20, gcc-10, g++-10, ON, 4.3.5, cmake)	1s
tests (ubuntu-20.04, 17, gcc-9, g++-9, ON, 4.3.5, cmake, -DCOVERAGE=ON, lcov)	1s
tests (ubuntu-22.04, 20, gcc-11, g++-11, OFF, 4.3.5, cmake)	1m 8s
tests (ubuntu-20.04, 17, clang-12, clang++-12, ON, 4.3.5, cmake)	1s
tests (windows-2022, 20, msbuild, msbuild, ON, 4.3.5, cmake, -Ax64)	2m 16s
tests (windows-2019, 14, msbuild, msbuild, ON, 4.3.5, cmake, -Ax64)	2m 1s
tests (macos-latest, 17, clang, clang++, OFF, 4.3.5, false, zeromq)	39s
	6m 10s

Provide feedback