stop using super-old import x = require('x') syntax

[codecov[bot]]

Codecov Report

Merging #629 (203dcaf) into main (c7828b2) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #629   +/-   ##
=======================================
  Coverage   99.10%   99.10%           
=======================================
  Files          12       12           
  Lines         447      447           
  Branches       95       95           
=======================================
  Hits          443      443           
  Misses          4        4           

Files	Coverage Δ
src/cli.ts	100.00% <100.00%> (ø)
src/file-locker.ts	96.77% <100.00%> (ø)
src/umzug.ts	98.64% <100.00%> (ø)

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[github-actions[bot]]

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