fix(module: cascader): crashes when options is null (#563)

[noctis0430]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• Bundle size optimization
• Performance optimization
• Refactoring
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🔗 Related issue link

Fix #563

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Changelog is provided or not needed

[dnfadmin]

All CLA requirements met.

[github-actions]

[codecov]

Codecov Report

Merging #2105 (22372be) into master (b2d24d1) will increase coverage by 1.93%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2105      +/-   ##
==========================================
+ Coverage   27.93%   29.87%   +1.93%     
==========================================
  Files         492      515      +23     
  Lines       32509    24746    -7763     
  Branches        0      240     +240     
==========================================
- Hits         9083     7393    -1690     
+ Misses      23426    17317    -6109     
- Partials        0       36      +36     

Impacted Files	Coverage Δ
components/cascader/Cascader.razor.cs	22.77% <100.00%> (+5.27%)	⬆️
components/core/Helpers/MemberPath/PathNode.cs	46.15% <0.00%> (-8.85%)	⬇️
components/core/Reflection/TypeDefined.cs	77.77% <0.00%> (-7.94%)	⬇️
components/input/InputGroup.razor.cs	87.50% <0.00%> (-6.95%)	⬇️
...ponents/date-picker/types/DatePickerPlaceholder.cs	22.72% <0.00%> (-4.20%)	⬇️
...ponents/core/Component/Overlay/type/TriggerType.cs	81.25% <0.00%> (-2.97%)	⬇️
components/core/Component/Overlay/Overlay.razor.cs	65.89% <0.00%> (-2.86%)	⬇️
components/core/Helpers/DateHelper.cs	80.00% <0.00%> (-2.71%)	⬇️
...nts/core/Component/Overlay/OverlayTrigger.razor.cs	53.47% <0.00%> (-2.50%)	⬇️
components/timeline/Timeline.razor.cs	63.21% <0.00%> (-2.24%)	⬇️
... and 424 more

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[ElderJames]

@noctis0430 Thank you.