Add XML reporter and approval tests #351

Job	Run time
Ubuntu GCC Release	2m 50s
Ubuntu GCC Debug	1m 16s
Ubuntu GCC noexcept Release	1m 27s
Ubuntu GCC noexcept Debug	48s
Ubuntu GCC notime Release	1m 42s
Ubuntu GCC notime Debug	1m 9s
Ubuntu GCC nounity Release	1m 43s
Ubuntu GCC nounity Debug	54s
Ubuntu Clang Release	1m 22s
Ubuntu Clang Debug	1m 42s
Ubuntu Clang noexcept Release	1m 9s
Ubuntu Clang noexcept Debug	1m 18s
Windows 32 Release	3m 28s
Windows 32 Debug	1m 7s
Windows 64 Release	5m 1s
Windows 64 Debug	2m 35s
Windows 64 noexcept Release	4m 51s
Windows 64 noexcept Debug	1m 57s
MacOS Release	1m 56s
MacOS Debug	3m 25s
MacOS noexcept Release	1m 36s
MacOS noexcept Debug	1m 15s
WebAssembly Release	54s
WebAssembly Debug	3m 24s
WebAssembly noexcept Release	1m 10s
WebAssembly noexcept Debug	1m 1s
	51m 0s

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