Fix faker-ruby#2093 Allow custom start for forward date generator

 *Allow set from as String or Date type

test/faker/default/test_faker_date.rb

@@ -63,6 +63,16 @@ def test_forward
     end
   end
 
+  def test_forward_with_from
+    from = Date.parse('2012-01-01')
+
+    100.times do
+      random_date = @tester.forward(from: from, days: 5)
+
+      assert random_date > from, "Expected > \"#{from}\", but got #{random_date}"
+    end
+  end
+
   def test_backward
     today = Date.today