zq update through "small refactor of groupby to get rid of params" by…

… mccanne

This is an auto-generated commit with a zq dependency update. The zq PR
brimdata/super#1720, authored by @mccanne,
has been merged.

small refactor of groupby to get rid of params

This is a small change to the groupby proc, which moves ast- and
compiler-specific logic to proc/compiler and eliminates groupby.Params.
This is a baby step toward the compiler refactor (issue brimdata/super#1162)
and the bug fix for output type tracking (issue brimdata/super#1701).

package.json

@@ -176,7 +176,7 @@
     "styled-components": "^5.1.1",
     "valid-url": "^1.0.9",
     "zealot": "file:zealot",
-    "zq": "git+https://github.com/brimsec/zq.git#a144052aeff2bd6a79146dba4756431fdfddc7bd"
+    "zq": "git+https://github.com/brimsec/zq.git#91703a64366ef1461b9379b4b7940b623c5b05bd"
   },
   "optionalDependencies": {
     "electron-installer-debian": "^3.0.0",