added fno-exceptions support. #105

Job	Run time
posix-cmake-subdir (ubuntu-22.04, OFF)	37s
posix-cmake-subdir (ubuntu-22.04, ON)	46s
posix-cmake-install (ubuntu-22.04, OFF)	43s
posix-cmake-subdir (macos-13, OFF)	1m 14s
posix (gcc-11, 2a, ubuntu-22.04)	3m 29s
posix-cmake-install (ubuntu-22.04, ON)	52s
posix-cmake-subdir (macos-13, ON)	1m 26s
posix-cmake-test (ubuntu-22.04, OFF)	3m 42s
posix (gcc-12, 20,2b, ubuntu-22.04, g++-12)	8m 26s
posix-cmake-install (macos-13, OFF)	1m 37s
posix-cmake-install (macos-13, ON)	1m 31s
posix-cmake-test (ubuntu-22.04, ON)	3m 53s
posix (gcc-13, 20,2b, ubuntu-latest, ubuntu:23.04, g++-13)	7m 30s
windows (msvc-14.3, 20,latest, 32,64, windows-2022)	17m 18s
posix-cmake-test (macos-13, OFF)	2m 3s
posix (clang, clang++-14, 20,2b, libc++, ubuntu-22.04, clang-14 libc++-14-dev)	6m 44s
windows-cmake-install (windows-2022, OFF)	2m 48s
posix-cmake-test (macos-13, ON)	1m 52s
windows (gcc, 2a, 64, windows-2019)	1m 48s
posix (clang, 20,2b, macos-13, libc++)	6m 23s
windows-cmake-install (windows-2022, ON)	2m 32s
windows-cmake-subdir (windows-2022, OFF)	2m 37s
windows-cmake-test (windows-2022, OFF)	7m 23s
windows-cmake-test (windows-2022, ON)	7m 42s
	1h 34m 56s

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