**Simplify bulk insertion in table spec**

Updated the customer initialization to use hash literals and streamlined the insertion of customer records in test setup. This change reduces repetitive code, enhancing readability and maintainability. Ensures the insertion logic is more concise and aligns with best practices for database operations.

spec/table_spec.cr

@@ -27,13 +27,15 @@ describe Cql::Table do
     Northwind.customers.create!
 
     customers = [
-      CustomerModel.new(1, "'John'", "'New York'", 100),
-      CustomerModel.new(2, "'Jane'", "'New York'", 200),
+      {:name => "John", :city => "New York", :balance => 100},
+      {:name => "Jane", :city => "New York", :balance => 200},
     ]
 
-    customers.each do |c|
-      Northwind.insert.into(:customers).values(id: c.id, name: c.name, city: c.city, balance: c.balance).commit
-    end
+    Northwind
+      .insert
+      .into(:customers)
+      .values(customers)
+      .commit
 
     count_query = Northwind.query.from(:customers).count
     count_query.first!(as: Int32).should eq 2