Support Option.orNull()

[mincong-h]

#2571

[codecov-io]

Codecov Report

Merging #2572 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master    #2572   +/-   ##
=========================================
  Coverage     92.81%   92.81%           
- Complexity     5336     5338    +2     
=========================================
  Files            89       89           
  Lines         12742    12743    +1     
  Branches       1609     1609           
=========================================
+ Hits          11827    11828    +1     
  Misses          727      727           
  Partials        188      188           

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/io/vavr/control/Option.java	91.66% <100.00%> (+0.10%)	48.00 <2.00> (+2.00)

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[danieldietrich]

Thanks for your addition, it looks great!