Added compatability for non-scalar targets.

[nkupelioglu]

Added a check on the number of dimensions of the target tensor. If the number of dimensions is larger than 1, then use method torch.stack to merge the tensors, else keep using torch.tensor.

• This would work in handling non-scalar targets with minimal change.

[codecov-commenter]

Codecov Report

Patch coverage: 80.00% and no project coverage change.

Comparison is base (4b89acb) 74.57% compared to head (e11748f) 74.57%.

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Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #263   +/-   ##
========================================
  Coverage    74.57%   74.57%           
========================================
  Files           51       51           
  Lines         2800     2804    +4     
========================================
+ Hits          2088     2091    +3     
- Misses         712      713    +1     

Files Changed	Coverage Δ
tonic/collation.py	84.61% <80.00%> (-1.75%)	⬇️

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[biphasic]

me likes! merged