feat: bump node12 to node16

[peaceiris]

Close #465

• deps: bump node12 to node16
• deps: bump @actions/core from 1.6.0 to 1.10.0

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (175f683) compared to base (95fa0b4).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #466   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            5         5           
  Lines          105       105           
  Branches        14        14           
=========================================
  Hits           105       105           

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