Release v0.2.0

The content is of the built PDF file is exactly the same as release v0.1.0.
There are only a few misc things changed like some comments about interesting custom packages were added in main.tex and this repo now uses Github Action to build and deploy to Release page instead of Travis CI.
Travis CI is still used, but setting up Github Action builds are easier so it's now the "main" CI service used in the repo.

v0.1.0

Initial release