rhealpix is not supported

[RuixiangLiuWHU]

crsFactory.createFromParameters("rHEALPix", "+proj=healpix +ellps=WGS84")
Exception in thread "main" org.locationtech.proj4j.InvalidValueException: Unknown projection: healpix
	at org.locationtech.proj4j.parser.Proj4Parser.parseProjection(Proj4Parser.java:74)
	at org.locationtech.proj4j.parser.Proj4Parser.parse(Proj4Parser.java:58)
	at org.locationtech.proj4j.CRSFactory.createFromParameters(CRSFactory.java:127)
	at org.locationtech.proj4j.CRSFactory.createFromParameters(CRSFactory.java:106)

[pomadchin]

hi @RuixiangLiuWHU, yes we don't support it, a nice feature request! I'll be happy to help you if you willing to make a contribution.