Migration: Drop Support for Travis-CI

[BenjamenMeyer]

Thank you for submitting a pull request and becoming a contributor to Vega Strike: Upon the Coldest Sea.

Please answer the following:

Code Changes:

• [ ] Have the PR Validation Tests been run? See https://github.com/vegastrike/Vega-Strike-Engine-Source/wiki/Pull-Request-Validation
• [ ] This is a documentation change only
• [x] CI System Change

Issues:

• 43, #44

Purpose:

• What is this pull request trying to do? 0.8.x
• What release is this for? 0.8.x
• Is there a project or milestone we should apply this to? 0.8.x