fix: fix timebased charts display with groupdate 5.2 and ruby 3.0 (#462)

Author: jeffladiray

app/services/forest_liana/line_stat_getter.rb

@@ -5,7 +5,7 @@ class LineStatGetter < StatGetter
     def client_timezone
       # As stated here https://github.com/ankane/groupdate#for-sqlite
       # groupdate does not handle timezone for SQLite
-      return nil if 'SQLite' == ActiveRecord::Base.connection.adapter_name
+      return false if 'SQLite' == ActiveRecord::Base.connection.adapter_name
       @params[:timezone]
     end
 
@@ -31,9 +31,7 @@ def perform
 
       Groupdate.week_start = :monday
 
-      value = value.send(time_range, group_by_date_field, {
-        time_zone: client_timezone
-      })
+      value = value.send(time_range, group_by_date_field, time_zone: client_timezone)
 
       value = value.send(@params[:aggregate].downcase, @params[:aggregate_field])
         .map do |k, v|

spec/services/forest_liana/line_stat_getter_spec.rb

@@ -2,11 +2,11 @@ module ForestLiana
   describe LineStatGetter do
     describe 'Check client_timezone function' do
       describe 'with a SQLite database' do
-        it 'should return nil' do
+        it 'should return false' do
           expect(LineStatGetter.new(Owner, {
             timezone: "Europe/Paris",
             aggregate: "Count",
-          }).client_timezone).to eq(nil)
+          }).client_timezone).to eq(false)
         end
       end