Rewrite with typescript

[lucleray]

WIP

[codecov]

Codecov Report

Merging #6 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #6   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      3    +1     
  Lines          35     43    +8     
  Branches        2      2           
=====================================
+ Hits           35     43    +8

Impacted Files	Coverage Δ
lib/utils.ts	100% <100%> (ø)
pg.ts	100% <100%> (ø)
sql.ts	100% <100%> (ø)

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