Publish the package to Sublime's Package Control

[novusnota]

This repo shall become public before approaching this issue, but after completing those:

• Re-structure the grammar for syntax highlighting #1
• Update syntax to match Tact 1.3.0 #2
• Brush-up the README before publishing #3
• Add syntax highligting tests (including CI for them) #4
• Update snippets, syntax completions and add a build setup (a basic check will do) #6
• Grammar: couple things to fix #9

Useful links:

• https://packagecontrol.io/docs/submitting_a_package
• https://raw.githubusercontent.com/wbond/package_control/master/example-repository.json

[novusnota]

wbond/package_control_channel#8934