Fix warnings of using AnyObject

[bannzai]

Links

resolved: #278

[codecov-commenter]

Codecov Report

Merging #279 (ab59025) into master (249acf0) will decrease coverage by 12.35%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #279       +/-   ##
===========================================
- Coverage   93.93%   81.58%   -12.36%     
===========================================
  Files           8       23       +15     
  Lines         132     1575     +1443     
===========================================
+ Hits          124     1285     +1161     
- Misses          8      290      +282     

Impacted Files	Coverage Δ
Framework/Sources/SpreadsheetViewDataSource.swift	0.00% <ø> (ø)
Framework/Sources/SpreadsheetViewDelegate.swift	0.00% <ø> (ø)
Framework/Sources/ScrollView.swift	54.76% <0.00%> (-45.24%)	⬇️
Framework/Sources/LayoutEngine.swift	80.06% <0.00%> (-19.94%)	⬇️
Framework/Sources/SpreadsheetView.swift	90.16% <0.00%> (-9.84%)	⬇️
Framework/Sources/ReuseQueue.swift	92.00% <0.00%> (-8.00%)	⬇️
Framework/Sources/Cell.swift	94.73% <0.00%> (-5.27%)	⬇️
Framework/Sources/CircularScrolling.swift	95.13% <0.00%> (-3.14%)	⬇️
...k/Sources/SpreadsheetView+CirclularScrolling.swift	79.71% <0.00%> (ø)
Framework/Sources/Location.swift	100.00% <0.00%> (ø)
... and 14 more

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