PHP 7.2 Support

[darrynten]

• PHP 7.2 Support
• PHP 7.2 Tests
• Filter Collection Bugfix
• Rotation Support on Text Layers

[codecov]

Codecov Report

Merging #33 into dev will increase coverage by 6.69%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##                dev      #33      +/-   ##
============================================
+ Coverage     86.63%   93.32%   +6.69%     
- Complexity      202      205       +3     
============================================
  Files            24       24              
  Lines           561      569       +8     
============================================
+ Hits            486      531      +45     
+ Misses           75       38      -37

Impacted Files	Coverage Δ	Complexity Δ
src/Layers/Layer/TextLayer.php	99.34% <100%> (+14.51%)	52 <2> (+3)	⬆️
src/Layers/BaseLayer.php	100% <100%> (+4.83%)	27 <0> (ø)	⬇️
src/Layers/Layer/PatternLayer.php	68.75% <0%> (+6.25%)	9% <0%> (ø)	⬇️
src/Layers/Layer/RadialGradientLayer.php	65.51% <0%> (+6.89%)	10% <0%> (ø)	⬇️
src/Pslayers.php	100% <0%> (+7.14%)	6% <0%> (ø)	⬇️
src/Filters/Filter/Standard/Blur/BlurFilter.php	72.22% <0%> (+11.11%)	6% <0%> (ø)	⬇️
src/Filters/BaseFilter.php	100% <0%> (+14.28%)	7% <0%> (ø)	⬇️
src/Layers/Layer/GroupLayer.php	100% <0%> (+20%)	7% <0%> (ø)	⬇️

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