add new parameters

lib/src/anim_search_widget.dart

@@ -40,7 +40,7 @@ class AnimSearchBar extends StatefulWidget {
   final bool boxShadow;
   final Function(String) onSubmitted;
   final TextStyle? helpTextStyle;
-  final double helpTextContentPadding;
+  final EdgeInsetsGeometry helpTextContentPadding;
 
   const AnimSearchBar({
     Key? key,
@@ -95,7 +95,7 @@ class AnimSearchBar extends StatefulWidget {
       fontSize: 17.0,
       fontWeight: FontWeight.w500,
     ),
-    this.helpTextContentPadding = 5.0,
+    this.helpTextContentPadding = const EdgeInsets.only(bottom: 5.0),
   }) : super(key: key);
 
   @override
@@ -282,7 +282,7 @@ class _AnimSearchBarState extends State<AnimSearchBar>
                         : TextStyle(color: Colors.black),
                     cursorColor: Colors.black,
                     decoration: InputDecoration(
-                      contentPadding: EdgeInsets.only(bottom: widget.helpTextContentPadding),
+                      contentPadding: widget.helpTextContentPadding,
                       isDense: true,
                       floatingLabelBehavior: FloatingLabelBehavior.never,
                       labelText: widget.helpText,