deps: change @zeit/ncc to @vercel/ncc

[peaceiris]

cf. actions/checkout#337

[codecov]

Codecov Report

Merging #459 into main will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #459   +/-   ##
=======================================
  Coverage   52.17%   52.17%           
=======================================
  Files           4        4           
  Lines         276      276           
  Branches       47       47           
=======================================
  Hits          144      144           
  Misses        131      131           
  Partials        1        1           

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