Adding patch by Jeffrey Harris optimizing rrule.__contains__().
Adding patch by Jeffrey Harris optimizing rrule.__contains__().

pganssle/dateutil-test-codecov,mjschultz/dateutil,jenshnielsen/dateutil,sprymix/dateutil,adamgreig/python-dateutil,sprymix/python-dateutil,abalkin/dateutil,Bachmann1234/dateutil,pganssle/dateutil-test-codecov,emsoftware/python-dateutil,abalkin/dateutil