Unicode math properties #1519

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Run time

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Job	Run time
TexLive none / Perl 5.34	3m 59s
TexLive none / Perl 5.32	4m 4s
TexLive none / Perl 5.30	3m 50s
TexLive none / Perl 5.28	4m 5s
TexLive none / Perl 5.26	4m 4s
TexLive 2021 / Perl 5.34	10m 50s
TexLive 2020 / Perl 5.32	9m 19s
TexLive 2019 / Perl 5.30	8m 38s
TexLive 2018 / Perl 5.28	7m 45s
	56m 34s