Log Message:
Update to 3.46. From the changelog:

- fixed xterm256 and truecolor whitespace outpur \ 
(https://gitlab.com/saalen/highlight/issues/90)
- converted manuals to AsciiDoc (thanks to Tristano Ajmone)
- added DocumentHeader and DocumentFooter plug-in hooks
- added RemoveKeyword Lua function for syntax definitions
- added syntax test indicators (see README_TESTCASES)
- added support for ISO and R10 variants of Modula2 (thanks to Benjamin Kowarsch)
- fixed R identifiers (https://gitlab.com/saalen/highlight/merge_requests/77)
- fixed ALAN IF identifiers (see \ 
https://gitlab.com/saalen/highlight/merge_requests/79)
- fixed issue with Bash string interpolation
- fixed some bugs found by coverity tool \ 
(https://gitlab.com/saalen/highlight/issues/82)
- added Swift keywords and types
- added filetypes.conf.5 man page (https://gitlab.com/saalen/highlight/issues/83)
- added Gradle extension mapping \ 
(https://gitlab.com/saalen/highlight/merge_requests/80)