Allow virtualpage->set() to accept [$obj, $method]

[DarkSide666]

fixes #231

[codecov]

Codecov Report

Merging #232 into develop will increase coverage by 0.53%.
The diff coverage is 22.22%.

@@              Coverage Diff              @@
##             develop     #232      +/-   ##
=============================================
+ Coverage      72.96%   73.49%   +0.53%     
+ Complexity      1053     1051       -2     
=============================================
  Files             58       58              
  Lines           2508     2513       +5     
=============================================
+ Hits            1830     1847      +17     
+ Misses           678      666      -12

Impacted Files	Coverage Δ	Complexity Δ
src/View.php	78.02% <0%> (-0.51%)	128 <0> (ø)
src/VirtualPage.php	78.57% <28.57%> (+37.54%)	24 <0> (-2)	⬇️

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