Specify commit for redis library

nitter.nimble

@@ -17,7 +17,7 @@ requires "nimcrypto >= 0.4.11"
 requires "karax >= 1.1.2"
 requires "sass"
 requires "markdown#head"
-requires "https://github.com/zedeus/redis#head"
+requires "https://github.com/zedeus/redis#94bcbf1"
 requires "redpool#head"
 requires "packedjson"
 requires "snappy#d13e2cc"