Fix off-by-one-error in transform_single_time_series

[codecov[bot]]

Codecov Report

Merging #171 (d82a908) into master (c1fa80b) will increase coverage by 2.07%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #171      +/-   ##
==========================================
+ Coverage   70.35%   72.43%   +2.07%     
==========================================
  Files          41       41              
  Lines        2601     2909     +308     
==========================================
+ Hits         1830     2107     +277     
- Misses        771      802      +31     

Flag	Coverage Δ
unittests	72.43% <100.00%> (+2.07%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/time_series_parameters.jl	93.47% <100.00%> (+1.27%)	:arrow_up:
src/time_series_formats.jl	61.22% <0.00%> (-7.83%)	:arrow_down:
src/single_time_series.jl	58.51% <0.00%> (-1.23%)	:arrow_down:
src/time_series_parser.jl	64.63% <0.00%> (-1.12%)	:arrow_down:
src/deterministic.jl	78.12% <0.00%> (-0.45%)	:arrow_down:
src/time_series_utils.jl	100.00% <0.00%> (ø)
src/deterministic_metadata.jl	100.00% <0.00%> (ø)
src/utils/stdout_redirector.jl	100.00% <0.00%> (ø)
src/utils/flatten_iterator_wrapper.jl	100.00% <0.00%> (ø)
src/hdf5_time_series_storage.jl	94.56% <0.00%> (+0.24%)	:arrow_up:
... and 26 more