Log Message:
Update to highlight 3.48. From the changelog:

 - fixed --list-scripts abortion with Fedora default compilation options
     (https://gitlab.com/saalen/highlight/issues/84)
 - fixed a problem with syntax test indicators reporting wrong states after comments
 - improved Verilog syntax
 - improved quoted string highlighting for Perl and Ruby
 - detection of pkg-config's Lua version in src/makefile