Add WebSocket support (ws)

[timokoessler]

• https://www.npmjs.com/package/ws
• API of ws: https://github.com/websockets/ws/blob/master/doc/ws.md

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 92.93194% with 27 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
library/sources/ws/wrapSocketEvents.ts	90.62%	9 Missing :warning:
library/sources/ws/parseWSData.ts	94.87%	6 Missing :warning:
library/sources/Ws.ts	90.90%	3 Missing :warning:
...brary/sources/http-server/createUpgradeListener.ts	92.85%	3 Missing :warning:
library/sources/ws/contextFromConnection.ts	90.62%	2 Missing and 1 partial :warning:
library/sources/ws/wrapHandleUpgrade.ts	93.87%	3 Missing :warning:

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