Escape svg label #327

Job	Run time
Test javascript files	42s
Test on PHP 8 (amd64)	44s
Test on PHP (+ ext-dbase) 7.2 and ubuntu-latest	4m 19s
Test on PHP 7.2 and ubuntu-latest	4m 20s
Test on PHP 8 (arm64v8)	2m 54s
Test on PHP (+ ext-recode) 7.2 and ubuntu-latest	4m 21s
Test on PHP 7.3 and ubuntu-latest	3m 5s
Test on PHP 8 (arm32v7)	2m 57s
Test on PHP 7.2 (+ psr7-guzzlehttp/psr7)	1m 24s
Test on PHP 7.4 and ubuntu-latest	2m 53s
Test on PHP 7.2 (+ psr7-slim/psr7)	1m 32s
Test on PHP 8 (arm32v6)	3m 1s
Test on PHP 8.0 and ubuntu-latest	2m 35s
Test on PHP 8 (i386)	46s
Test on PHP 7.2 (+ psr7-nyholm/psr7)	1m 47s
Test on PHP 8.1 and ubuntu-latest	2m 37s
Test on PHP 8 (ppc64le)	2m 55s
Test on PHP 8.0 (+ psr7-laminas/laminas-diactoros)	1m 56s
Test on PHP 8.2 and ubuntu-latest	2m 56s
Test on PHP 8 (s390x)	3m 6s
Test on PHP 8.3 and ubuntu-latest	2m 56s
Test on PHP nightly and ubuntu-latest	1m 26s
	55m 12s

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