Update version numbers etc for v1.4.2 #65

Job	Run time
--disable-hpcombi --disable-eigen (macOS-latest)	7m 26s
--disable-hpcombi --enable-eigen (macOS-latest)	5m 14s
--enable-hpcombi --disable-eigen (ubuntu-latest)	8m 33s
--disable-hpcombi --enable-eigen (ubuntu-latest)	9m 47s
--enable-hpcombi --disable-eigen (macOS-latest)	7m 19s
--disable-hpcombi --disable-eigen (ubuntu-latest)	7m 59s
	46m 18s

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