Bump to v0.7.3 #1522

Job	Run time
test-linux-add_subdirectory (On)	31s
test-linux-fetchcontent (On)	35s
test-linux-findpackage (On)	1m 16s
test-linux-add_subdirectory (Off)	31s
test-linux-fetchcontent (Off)	1m 2s
test-linux-findpackage (Off)	54s
test-macos-add_subdirectory (On)	28s
test-macos-fetchcontent (On)	27s
test-macos-add_subdirectory (Off)	40s
test-macos-findpackage (On)	23s
test-macos-fetchcontent (Off)	32s
test-mingw-add_subdirectory (On)	1m 57s
test-macos-findpackage (Off)	23s
test-mingw-add_subdirectory (Off)	2m 15s
test-mingw-fetchcontent (On)	2m 22s
test-mingw-findpackage (On)	1m 56s
test-mingw-fetchcontent (Off)	3m 3s
test-windows-add_subdirectory (On)	1m 57s
test-mingw-findpackage (Off)	1m 40s
test-windows-add_subdirectory (Off)	1m 20s
test-windows-fetchcontent (On)	1m 9s
test-windows-findpackage (On)	1m 36s
test-windows-fetchcontent (Off)	1m 13s
test-windows-findpackage (Off)	1m 45s
	29m 55s

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