Experiment with GitHub actions

[dimamo5]

This PR adds initial support to Github Actions. It's basically a copy of our pipeline from Travis.

I think it's best to have both of them. I'm not entirely sure that Github Actions has the same stability as Travis.

[codecov]

Codecov Report

Merging #14 into master will decrease coverage by 4.69%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             master      #14     +/-   ##
===========================================
- Coverage     73.28%   68.58%   -4.7%     
  Complexity        1        1             
===========================================
  Files             8        8             
  Lines           146      156     +10     
  Branches         20       21      +1     
===========================================
  Hits            107      107             
- Misses           30       40     +10     
  Partials          9        9

Impacted Files	Coverage Δ	Complexity Δ
...c/main/kotlin/com/velocidi/GetAdvertisingIdTask.kt	5.88% <0%> (-8.41%)	0% <0%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fe2374b...e8c6f29. Read the comment docs.

[queimadus]

LGTM!