added transformation snippet in readme

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (f0d610c) 95.98% compared to head (06b5282) 95.98%. Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #85 +/- ## ======================================= Coverage 95.98% 95.98% ======================================= Files 9 9 Lines 224 224 Branches 59 59 ======================================= Hits 215 215 Misses 1 1 Partials 8 8 ```

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