Bump squirreling to 0.12.26 for aggregate scan coalescing

The v0.8.12 characterization test expects multiple aggregates on one
column to share a single scanColumn pass, but that behavior only landed
in squirreling 0.12.26.

Signed-off-by: Karl Pietrzak <karl@medplum.com>

Author: The-Alchemist

package.json

@@ -56,7 +56,7 @@
     "hyparquet": "1.26.2",
     "hyparquet-compressors": "1.1.1",
     "hyparquet-writer": "0.16.1",
-    "squirreling": "0.12.25"
+    "squirreling": "0.12.26"
   },
   "peerDependencies": {
     "@aws-sdk/credential-providers": "^3.0.0"