Allow changing decoration

[OlivierHnt]

Closes #624.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 82.99%. Comparing base (02b0f6b) to head (ec8799d).

❗ Current head ec8799d differs from pull request most recent head 1b0de15. Consider uploading reports for the commit 1b0de15 to get more accurate results

Files	Patch %	Lines
src/intervals/construction.jl	83.33%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #632   +/-   ##
=======================================
  Coverage   82.99%   82.99%           
=======================================
  Files          26       26           
  Lines        2176     2182    +6     
=======================================
+ Hits         1806     1811    +5     
- Misses        370      371    +1     

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