Allow pstr quasiquoter as pattern too #224

Job	Run time
i386	4m 50s
arm (arm32v7)	4m 3s
darwin_arm (self-hosted, macOS, ARM64, 8.10.7)	55s
arm (arm64v8)	3m 29s
build (ubuntu-latest, 8.6, 3.8.1.0)	5m 14s
darwin_arm (self-hosted, macOS, ARM64, 9.2.6)	47s
build (ubuntu-latest, 8.8, 3.8.1.0)	5m 9s
darwin_arm (self-hosted, macOS, ARM64, 9.4.4)	54s
build (ubuntu-latest, 8.10, 3.8.1.0)	5m 42s
build (ubuntu-latest, 9.0, 3.8.1.0)	5m 18s
build (ubuntu-latest, 9.2, 3.8.1.0)	4m 9s
build (ubuntu-latest, 9.4, 3.8.1.0)	4m 31s
build (ubuntu-latest, 9.6, 3.8.1.0)	3m 0s
build (ubuntu-latest, 9.8, 3.8.1.0)	3m 43s
build (macOS-latest, 9.4, 3.8.1.0)	11m 0s
build (macOS-latest, 9.6, 3.8.1.0)	9m 57s
build (windows-latest, 9.4, 3.8.1.0)	14m 36s
build (windows-latest, 9.6, 3.8.1.0)	18m 1s
	1h 45m 18s

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