Add support for having clause

Author: danilagamma

lib/panoramix/query.ex

@@ -11,6 +11,7 @@ defmodule Panoramix.Query do
             dimension: nil,
             dimensions: nil,
             filter: nil,
+            having: nil,
             granularity: nil,
             intervals: nil,
             limit: nil,
@@ -35,6 +36,7 @@ defmodule Panoramix.Query do
     :analysis_types,
     :dimension,
     :dimensions,
+    :having,
     :granularity,
     :limit,
     :limit_spec,
@@ -953,6 +955,7 @@ defmodule Panoramix.Query do
       dimension: query.dimension,
       dimensions: query.dimensions,
       filter: query.filter,
+      having: query.having,
       granularity: query.granularity,
       intervals: query.intervals,
       limit: query.limit,