Improve text animation (#146)

[danilodanicomendes]

• Add Xfer mode to paint, so the text pixels are only drawn when the background reaches them.

[codecov]

Codecov Report

Merging #200 (1b002a9) into master (ef54083) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master     #200   +/-   ##
=========================================
  Coverage     92.55%   92.56%           
  Complexity      415      415           
=========================================
  Files            21       21           
  Lines          1303     1304    +1     
  Branches        150      149    -1     
=========================================
+ Hits           1206     1207    +1     
  Misses           78       78           
  Partials         19       19           

Impacted Files	Coverage Δ
...terialtaptargetprompt/MaterialTapTargetPrompt.java	78.59% <100.00%> (-0.06%)	⬇️
...all/materialtaptargetprompt/extras/PromptText.java	100.00% <100.00%> (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 ef54083...1b002a9. Read the comment docs.

[sjwall]

Thank you for the PR, this is released in v3.3.1