deps: Rollback types/node 13 to 12

[peaceiris]

No description provided.

[codecov]

Codecov Report

Merging #99 into master will not change coverage by %.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #99   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          105       105           
  Branches        14        14           
=========================================
  Hits           105       105           

Impacted Files	Coverage Δ
src/installer.ts	100.00% <0.00%> (ø)	⬆️

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