Source of OpenCV.js

[[OpenCV]] | [[JavaScript]]

- https://github.com/opencv/opencv/releases (opencv-*-docs.zip）
- https://docs.opencv.org/3.4/d5/d10/tutorial_js_root.html

*. [#sd0a34cc]
- OpenCV.jsをJavaScript/Node.jsで使ってみた
--  https://dev.classmethod.jp/articles/using-opencvjs-with-javascript-and-nodejs/