Enhance antq.clj by adding a dependency to SLF4J

[jdjohnston]

As described in Avoid SLF4J warnings.

I tried this on a local copy installed with bbin by adding it to the definition of deps (line 9 of antq.clj). Worked as expected in simple testing.

Thanks for making antq available as a bbin script!

[borkdude]

Done!