loxberryupdatecheck.pl: Return blocked_version
loxberryupdatecheck.pl: Return blocked_version

JSON Output:
- Return version_blocked if a higher pre-/release than allowed by max_version exists
- Fixed wrong detection output release <-> prerelease

#1078

mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry,mschlenstedt/Loxberry