Use lts version in CI

[codecov[bot]]

Codecov Report

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

Project coverage is 89.61%. Comparing base (24ba638) to head (56cc029). Report is 6 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #445 +/- ## ========================================== + Coverage 89.57% 89.61% +0.03% ========================================== Files 25 25 Lines 3559 3571 +12 ========================================== + Hits 3188 3200 +12 Misses 371 371 ```

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