Since XCode 15.0 locally built RNP is unable to locate rnp.dylib

[ni4]

Description

Since XCode 15.0 or somewhere close dylib doesn't add /usr/local/lib to default search path, which causes the following error:

/usr/local/bin/rnp --version
dyld[20382]: Symbol not found: _rnp_backend_string
  Referenced from: <51E82EE0-691A-3814-BD0F-F3202DC0BE2C> /usr/local/bin/rnp
  Expected in:     <no uuid> unknown
Abort trap: 6

So we should consider to replace rpath from @rpath/librnp.0.dylib to @rpath/../lib/librnp.0.dylib (or any better solution if any, didn't dig deep to it). Right come could be overriden by DYLD_LIBRARY_PATH=/usr/local/lib rnp --version.

More details are available here: https://developer.apple.com/forums/thread/737920