Add support for vector of pairs in `Rename` transform

[eliascarv]

closes #260

[codecov-commenter]

Codecov Report

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

Comparison is base (c7b2fcf) 94.56% compared to head (7665388) 94.57%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #261 +/- ## ======================================= Coverage 94.56% 94.57% ======================================= Files 46 46 Lines 1288 1290 +2 ======================================= + Hits 1218 1220 +2 Misses 70 70 ```

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