build

add C++20 module #277

Job	Run time
ubuntu cmake	13s
ubuntu (g++, standard)	1m 7s
windows (Win32, standard)	1m 40s
macos cmake	14s
ubuntu (g++, PUGIXML_WCHAR_MODE)	1m 8s
windows (Win32, PUGIXML_WCHAR_MODE)	2m 12s
ubuntu (g++, PUGIXML_COMPACT)	1m 8s
windows (Win32, PUGIXML_COMPACT)	1m 47s
ubuntu (g++, PUGIXML_NO_EXCEPTIONS)	1m 3s
windows (Win32, PUGIXML_NO_EXCEPTIONS)	1m 35s
ubuntu (g++, PUGIXML_STRING_VIEW)	1m 12s
windows (Win32, PUGIXML_STRING_VIEW)	2m 14s
ubuntu (clang++, standard)	47s
windows (x64, standard)	2m 16s
ubuntu (clang++, PUGIXML_WCHAR_MODE)	56s
windows (x64, PUGIXML_WCHAR_MODE)	1m 19s
ubuntu (clang++, PUGIXML_COMPACT)	53s
windows (x64, PUGIXML_COMPACT)	2m 5s
ubuntu (clang++, PUGIXML_NO_EXCEPTIONS)	43s
windows (x64, PUGIXML_NO_EXCEPTIONS)	2m 16s
ubuntu (clang++, PUGIXML_STRING_VIEW)	48s
windows (x64, PUGIXML_STRING_VIEW)	1m 57s
macos (clang++, standard)	1m 13s
macos (clang++, PUGIXML_WCHAR_MODE)	45s
macos (clang++, PUGIXML_COMPACT)	43s
macos (clang++, PUGIXML_NO_EXCEPTIONS)	43s
macos (clang++, PUGIXML_STRING_VIEW)	44s
	33m 41s

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