Bump QuantPlatformKit to v0.3.1

Author: Pigbibi

requirements.txt

@@ -1,6 +1,6 @@
 flask
 gunicorn
-quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@v0.1.0
+quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@v0.3.1
 pandas
 numpy
 requests