Adding back a removed method

[lbergelson]

• Adding back an accidentally removed an overload of IntervalList.getUniqueIntervals().
• This fixes a compatibility problem revealed in the pre-release checks.

Checklist

• Code compiles correctly
• New tests covering changes and new functionality
• All tests passing
• Extended the README / documentation, if necessary
• Is not backward compatible (breaks binary or source compatibility)

[lbergelson]

@yfarjoun I missed this in review. Compatibility checker caught it...

[codecov-io]

Codecov Report

Merging #1321 into master will increase coverage by 0.007%.
The diff coverage is 0%.

@@               Coverage Diff               @@
##              master     #1321       +/-   ##
===============================================
+ Coverage     67.626%   67.633%   +0.007%     
- Complexity      8229      8230        +1     
===============================================
  Files            562       562               
  Lines          33617     33618        +1     
  Branches        5642      5642               
===============================================
+ Hits           22734     22737        +3     
+ Misses          8708      8707        -1     
+ Partials        2175      2174        -1

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/htsjdk/samtools/util/IntervalList.java	74.51% <0%> (-0.244%)	75 <0> (ø)
...samtools/util/AsyncBlockCompressedInputStream.java	76% <0%> (+4%)	13% <0%> (+1%)	⬆️

[codecov-io]

Codecov Report

Merging #1321 into master will increase coverage by 0.007%.
The diff coverage is 0%.

@@               Coverage Diff               @@
##              master     #1321       +/-   ##
===============================================
+ Coverage     67.626%   67.633%   +0.007%     
- Complexity      8229      8230        +1     
===============================================
  Files            562       562               
  Lines          33617     33618        +1     
  Branches        5642      5642               
===============================================
+ Hits           22734     22737        +3     
+ Misses          8708      8707        -1     
+ Partials        2175      2174        -1

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/htsjdk/samtools/util/IntervalList.java	74.51% <0%> (-0.244%)	75 <0> (ø)
...samtools/util/AsyncBlockCompressedInputStream.java	76% <0%> (+4%)	13% <0%> (+1%)	⬆️

[yfarjoun]

odd....thanks!