Update dependency iconv to v3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
iconv	dependencies	major	^2.3.2 -> ^3.0.0

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Release Notes

bnoordhuis/node-iconv

v3.0.0

Compare Source

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[codecov]

Codecov Report

Merging #21 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #21   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines            9         9           
  Branches         3         3           
=========================================
  Hits             9         9           

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[renovate]

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Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 3.x releases. But if you manually upgrade to 3.x then Renovate will re-enable minor and patch updates automatically.

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