Use static_first, static_last, and static_step from Static.jl

[devmotion]

Just curious what happens.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (a29940f) to head (fcfb3b3).

❗ There is a different number of reports uploaded between BASE (a29940f) and HEAD (fcfb3b3). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (a29940f)	HEAD (fcfb3b3)
	4	3

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #46       +/-   ##
==========================================
- Coverage   88.45%   0.00%   -88.46%     
==========================================
  Files          11      11               
  Lines        1317    1304       -13     
==========================================
- Hits         1165       0     -1165     
- Misses        152    1304     +1152     

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