API changes list
- Add a new overload for execSqlCoro.
 
Changed
- 
Do not write to source directory during build.
 - 
Improve Postgres connection stability.
 - 
Add handleFatalError in handleClosed.
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Add -o|--output option to drogon_ctl create models.
 - 
Add qrcode for WeChat official account to the README file.
 - 
Support for iOS compiling.
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Add cors example to demonstrate cross-origin support in drogon.
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Add support for continuation frame in WebSocketMessageParser.
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Add RawParameter API to pass raw SQL parameters.
 - 
Upgrade Windows image and re-enable tests on Windows.
 
Fixed
- 
Fix a bug in isAutoCreationClass.
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Fix CI on MacOS.
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Fix issue with precision loss of double-type parameters in ORM inputs.