(#1566) Generify org.cactoos.list package

[DmitryBarskov]

For #1566:

Generify some classes in org.cactoos.list package:

• org.cactoos.list.Immutable
• org.cactoos.list.ImmutableListIterator
• org.cactoos.list.Joined
• org.cactoos.list.JoinedListIterator

[DmitryBarskov]

Hey @victornoel! Could you have a look please?

[codecov-commenter]

Codecov Report

Merging #1635 (fb5fccb) into master (2d3d898) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1635      +/-   ##
============================================
+ Coverage     90.10%   90.13%   +0.02%     
- Complexity     1603     1604       +1     
============================================
  Files           298      298              
  Lines          3749     3749              
  Branches        122      122              
============================================
+ Hits           3378     3379       +1     
  Misses          337      337              
+ Partials         34       33       -1     

Impacted Files	Coverage Δ
src/main/java/org/cactoos/list/Joined.java	100.00% <ø> (ø)
src/main/java/org/cactoos/list/Immutable.java	100.00% <100.00%> (ø)
...n/java/org/cactoos/list/ImmutableListIterator.java	91.66% <100.00%> (ø)
...main/java/org/cactoos/list/JoinedListIterator.java	75.60% <100.00%> (ø)
src/main/java/org/cactoos/scalar/Solid.java	100.00% <0.00%> (+10.00%)	⬆️

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[yegor256]

@victornoel what's up with this?

[victornoel]

@DmitryBarskov late review :)

[victornoel]

@DmitryBarskov I think that should be List<? extends ListIterator<..., here and everywhere else :)

[victornoel]

@DmitryBarskov thank you. Did you verify that there was no more class in the list package that would need changes like those?

[DmitryBarskov]

@DmitryBarskov thank you. Did you verify that there was no more class in the list package that would need changes like those?

@victornoel yes, checked it twice

[victornoel]

@DmitryBarskov excellent, thank you very much!

[victornoel]

@rultor merge

[rultor]

@rultor merge

@victornoel OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor merge

@victornoel Done! FYI, the full log is here (took me 8min)