Default value as Expression

[darkdef]

Q	A
Is bugfix?	✔️
New feature?	✔️
Breaks BC?	❌
Fixed issues	https://github.com/yiisoft/yii2/issues/19747

[codecov[bot]]

Codecov Report

Base: 99.67% // Head: 99.68% // Increases project coverage by +0.00% :tada:

Coverage data is based on head (48aa315) compared to base (102d368). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #241   +/-   ##
=========================================
  Coverage     99.67%   99.68%           
- Complexity      215      219    +4     
=========================================
  Files            13       13           
  Lines           617      629   +12     
=========================================
+ Hits            615      627   +12     
  Misses            2        2           

Impacted Files	Coverage Δ
src/Schema.php	99.64% <100.00%> (+0.01%)	:arrow_up:

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[darkdef]

Need more tests