feat: the RFC 6901 `"-"` array suffix is now supported (#121) #241

Job	Run time
test / Lint	37s
test / fuzz-test / Fuzz matrix	29s
test / fuzz-test / fuzz test (github.com/go-openapi/jsonpointer, FuzzParse)	2m 13s
test / Unit tests (macos-latest, oldstable)	44s
test / Unit tests (windows-latest, stable)	1m 22s
test / Unit tests (windows-latest, oldstable)	1m 41s
test / Unit tests (ubuntu-latest, stable)	40s
test / Unit tests (ubuntu-latest, oldstable)	37s
test / Unit tests (macos-latest, stable)	47s
test / collect-reports / collect test reports	11s
test / tests completed	2s
test / collect-coverage / collect test coverage	17s
	9m 40s

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