Remove require js, add upgrade step

[codecov[bot]]

Codecov Report

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

Comparison is base (7575bb8) 81.04% compared to head (f017406) 81.10%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #185 +/- ## ========================================== + Coverage 81.04% 81.10% +0.06% ========================================== Files 91 92 +1 Lines 3418 3429 +11 ========================================== + Hits 2770 2781 +11 Misses 648 648 ```

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