FIX: fix OnNew event must be called before OnFilled

[lanphan]

For some special case like IOC order is filled immediately, current code caused OnFilled event is called before OnNew event.
In order to fix it, I update the position of b.EmitNew(order) to guarantee OnNew event is always called before OnFilled event.

[bbgokarma-bot]

Welcome back! @lanphan, This pull request may get 206 BBG.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.11%. Comparing base (271eafa) to head (2a767ab).
Report is 19 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1751      +/-   ##
==========================================
- Coverage   24.11%   24.11%   -0.01%     
==========================================
  Files         615      617       +2     
  Lines       37544    37569      +25     
==========================================
+ Hits         9055     9060       +5     
- Misses      27691    27711      +20     
  Partials      798      798              

Files with missing lines	Coverage Δ
pkg/bbgo/activeorderbook.go	26.31% <100.00%> (+0.29%)	⬆️

... and 1 file with indirect coverage changes

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[bbgokarma-bot]

Hi @lanphan,

Well done! 216 BBG has been sent to your polygon wallet. Please check the following tx:

https://polygonscan.com/tx/0x5f41564d69899f311d6dbbcf723de20e118e0335022e9d897b45addc2ccc46bc

Thank you for your contribution!