Reworked the basic smoke test to improve code coverage.

[awhitford]

Overall an increase of about 10%, but opportunity still remains.

[codecov]

Codecov Report

Merging #135 into master will increase coverage by 9.87%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #135      +/-   ##
==========================================
+ Coverage   61.68%   71.55%   +9.87%     
==========================================
  Files           8        8              
  Lines         770      770              
==========================================
+ Hits          475      551      +76     
+ Misses        295      219      -76     

Impacted Files	Coverage Δ
lib/src/rotate.dart	62.38% <0.00%> (+1.83%)	⬆️
lib/src/text_liquid_fill.dart	88.88% <0.00%> (+2.46%)	⬆️
lib/src/scale.dart	60.20% <0.00%> (+3.06%)	⬆️
lib/src/fade.dart	57.30% <0.00%> (+3.37%)	⬆️
lib/src/colorize.dart	75.90% <0.00%> (+3.61%)	⬆️
lib/src/typer.dart	66.66% <0.00%> (+13.09%)	⬆️
lib/src/typewriter.dart	67.28% <0.00%> (+18.69%)	⬆️
lib/src/wavy.dart	92.43% <0.00%> (+26.89%)	⬆️

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[aagarwal1012]

Looks Great 👍