Use 'latest' tag in download link

Update readme

Update readme for Navicat 12.1.12

Update Readme for Navicat Premium 12.1.11

Update README

Merge branch 'windows' of https://github.com/DoubleLabyrinth/navicat-…

…keygen into windows

Add Linux compatibility

Update README.md

Add support for 12.0.28 and deprecate version judgement

Add support for 12.0.27