add cupy

Readme.md

@@ -229,6 +229,7 @@ Note: the one marked as `Live Trading` has reasonable live trading support for a
 - [numba](https://github.com/numba/numba) ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/numba/numba/main) - NumPy aware dynamic Python compiler using LLVM
 - [pybind11](https://github.com/pybind/pybind11) ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/pybind/pybind11/master) - Seamless operability between C++11 and Python
 - [pyo3](https://github.com/PyO3/pyo3)  ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/numba/numba/main) - Rust bindings for the Python interpreter
+- [CuPy](https://github.com/cupy/cupy/) ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/cupy/cupy/main) | `Python`, `C++`, `Cython`, `Cuda` | - CuPy is an open-source array library for GPU-accelerated computing with Python. 100x Boost for some operations
 - [Bottleneck](https://github.com/pydata/bottleneck) ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/pydata/bottleneck/master) | `Python`, `C` | - Fast NumPy array functions written in C
 - [NumExpr](https://github.com/pydata/numexpr) ![GitHub last commit (branch)](https://img.shields.io/github/last-commit/pydata/numexpr/master) | `Python`, `C++` | - Fast numerical array expression evaluator for Python, NumPy, PyTables, pandas, bcolz and more