v0.19.0 Long Polling typo & new domain

Overview

• Fixed #74
• Added net/http API caller implementation (bot option WithHTTPCaller(...) to use)
• Moved from telego.ml to telego.pixelbox.dev
• Updated examples

What's Changed

• Bump github.com/fasthttp/router from 1.4.14 to 1.4.15 by @dependabot in #79

Full Changelog: v0.18.2...v0.19.0