migrating to null safety

Author: damphat

CHANGELOG.md

@@ -1,3 +1,6 @@
+## 0.6.0
+- Migrating to null safety
+
 ## 0.5.5
 - hotfix: dart not support '\0' escape
 

README.md

@@ -31,7 +31,6 @@ void main() {
 ```
 
 ## Current limitations
-- It can parse String only, stream is not support
 - Only serialize classes which implement List and Map
 
 ## References

example/repl.dart

@@ -7,6 +7,10 @@ void main() {
   while (true) {
     stdout.write('json5>');
     var src = stdin.readLineSync();
+    if (src == null) {
+      print('break');
+      return;
+    }
     switch (src) {
       case '':
         continue;

lib/json5.dart

@@ -18,7 +18,7 @@ abstract class JSON5 {
   /// are supported.
   ///
   /// The altenative is [json5Encode(string)]
-  static String stringify(dynamic object, {space = 0}) {
+  static String? stringify(dynamic object, {space = 0}) {
     return render.stringify(object, null, space);
   }