Implement `propagate_sequence`

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.55172% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 89.6%. Comparing base (1946cd6) to head (bf771c2).

Files	Patch %	Lines
src/propagate_sequence.jl	96.6%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #71 +/- ## ======================================== + Coverage 89.2% 89.6% +0.5% ======================================== Files 28 29 +1 Lines 1965 1994 +29 ======================================== + Hits 1752 1786 +34 + Misses 213 208 -5 ```

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