NumPy built-in scalar types conversion exceptions

[peidongxie]

Environment	Info
OS	Ubuntu 20.04 LTS
Node.js	14.19.2
npm	8.9.0
NumPy	1.21.6

The numpy.float type will be converted to the primitive number type, but the numpy.int type will be converted to the primitive string type.

const boa = require("@pipcook/boa");
const np = boa.import("numpy");
console.log(typeof np.float_(0)); // number
console.log(typeof np.float64(0)); // number
console.log(typeof np.int_(0)); // string
console.log(typeof np.int64(0)); // string