ZefyrField: error when bold and italic to toggle on

[KolesnikovaKristinavm]

I got an error when bold and italic to toggle on.

Steps to Reproduce

1. Set bold or italic to toggle on
2. Try to go to a new line

Logs

I/flutter ( 6118): ══╡ EXCEPTION CAUGHT BY ZEFYR ╞═════════════════════════════════════════════════════════════════════
I/flutter ( 6118): The following assertion was thrown while updating editing value:
I/flutter ( 6118): It is not allowed to apply inline attributes to line itself.
I/flutter ( 6118): 'package:notus/src/document/line.dart':
I/flutter ( 6118): Failed assertion: line 231 pos 11: 'style.values.every((attr) => attr.scope ==
I/flutter ( 6118): NotusAttributeScope.line)'
I/flutter ( 6118):
I/flutter ( 6118): When the exception was thrown, this was the stack:
I/flutter ( 6118): #2 LineNode.retain
package:notus/…/document/line.dart:231
I/flutter ( 6118): #3 ContainerNode.retain
package:notus/…/document/node.dart:254
I/flutter ( 6118): #4 NotusDocument.compose
package:notus/src/document.dart:235
I/flutter ( 6118): #5 ZefyrController.replaceText
package:zefyr/…/widgets/controller.dart:133
I/flutter ( 6118): #6 _ZefyrEditableTextState._handleRemoteValueChange
package:zefyr/…/widgets/editable_text.dart:319
I/flutter ( 6118): #7 InputConnectionController.updateEditingValue
package:zefyr/…/widgets/input.dart:152
I/flutter ( 6118): #8 TextInput._handleTextInputInvocation
package:flutter/…/services/text_input.dart:1165
I/flutter ( 6118): #9 MethodChannel._handleAsMethodCall
package:flutter/…/services/platform_channel.dart:430
I/flutter ( 6118): #10 MethodChannel.setMethodCallHandler.
package:flutter/…/services/platform_channel.dart:383
I/flutter ( 6118): #11 _DefaultBinaryMessenger.handlePlatformMessage
package:flutter/…/services/binding.dart:283
I/flutter ( 6118): #12 _invoke3. (dart:ui/hooks.dart:280:15)
I/flutter ( 6118): #16 _invoke3 (dart:ui/hooks.dart:279:10)
I/flutter ( 6118): #17 _dispatchPlatformMessage (dart:ui/hooks.dart:154:5)
I/flutter ( 6118): (elided 5 frames from class _AssertionError and dart:async)
I/flutter ( 6118): ════════════════════════════════════════════════════════════════════════════════════════════════════

[singerdmx]

This repo has been inactive for months. See #409 (comment)

Just FYI to save your time here.