BREAKING CHANGE: set minimum node version to 14

[styfle]

• Set minimum node to version 14 since 12 is EOL
• Bump typescript to version 4

[codecov]

Codecov Report

Merging #318 (2514965) into main (3c39adf) will increase coverage by 0.25%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #318      +/-   ##
==========================================
+ Coverage   80.61%   80.86%   +0.25%     
==========================================
  Files          13       13              
  Lines        1501     1500       -1     
  Branches      557      556       -1     
==========================================
+ Hits         1210     1213       +3     
+ Misses        121      120       -1     
+ Partials      170      167       -3     

Impacted Files	Coverage Δ
src/analyze.ts	86.11% <ø> (ø)
src/node-file-trace.ts	88.00% <ø> (ø)
src/utils/static-eval.ts	83.80% <0.00%> (+0.63%)	⬆️
src/utils/wrappers.ts	76.47% <0.00%> (+1.71%)	⬆️

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