migrated to nullsafety

README.md

@@ -58,11 +58,11 @@ Search choices Widget with a single choice that opens a dialog or a menu to let
 
 ```dart
 factory SearchableDropdown.single({
-    Key key,
-    @required List<DropdownMenuItem<T>> items,
-    @required Function onChanged,
-    T value,
-    TextStyle style,
+    Key? key,
+    required List<DropdownMenuItem<T>> items,
+    required Function onChanged,
+    T? value,
+    TextStyle? style,
     dynamic searchHint,
     dynamic hint,
     dynamic disabledHint,
@@ -73,23 +73,23 @@ factory SearchableDropdown.single({
     dynamic closeButton = "Close",
     bool displayClearIcon = true,
     Icon clearIcon = const Icon(Icons.clear),
-    Color iconEnabledColor,
-    Color iconDisabledColor,
+    Color? iconEnabledColor,
+    Color? iconDisabledColor,
     double iconSize = 24.0,
     bool isExpanded = false,
     bool isCaseSensitiveSearch = false,
-    Function searchFn,
-    Function onClear,
-    Function selectedValueWidgetFn,
+    Function? searchFn,
+    Function? onClear,
+    Function? selectedValueWidgetFn,
     TextInputType keyboardType = TextInputType.text,
-    Function validator,
+    Function? validator,
     bool assertUniqueValue = true,
-    Function displayItem,
+    Function? displayItem,
     bool dialogBox = true,
-    BoxConstraints menuConstraints,
-    bool readOnly: false,
-    Color menuBackgroundColor,
-}
+    BoxConstraints? menuConstraints,
+    bool readOnly = false,
+    Color? menuBackgroundColor,
+  }
 )
 ```
 
@@ -133,8 +133,8 @@ Search choices Widget with a multiple choice that opens a dialog or a menu to le
 SearchableDropdown<T>.multiple(
 {
     Key key,
-    @required List<DropdownMenuItem<T>> items,
-    @required Function onChanged,
+    required List<DropdownMenuItem<T>> items,
+    required Function onChanged,
     List<int> selectedItems: const [],
     TextStyle style,
     dynamic searchHint,

example/pubspec.lock

@@ -7,35 +7,42 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.1"
+    version: "2.8.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.12"
+    version: "1.15.0"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -49,7 +56,7 @@ packages:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -66,21 +73,21 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.6"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   searchable_dropdown:
     dependency: "direct dev"
     description:
@@ -99,55 +106,55 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.15"
+    version: "0.4.2"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0"
 sdks:
-  dart: ">=2.6.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"