chore: update to node-12

[RasPhilCo]

No description provided.

[codecov]

Codecov Report

Merging #88 into master will decrease coverage by 66.74%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #88       +/-   ##
========================================
- Coverage   66.74%    0%   -66.75%     
========================================
  Files           7     2        -5     
  Lines         448    10      -438     
  Branches      123     3      -120     
========================================
- Hits          299     0      -299     
+ Misses        100    10       -90     
+ Partials       49     0       -49

Impacted Files	Coverage Δ
src/index.ts	0% <0%> (-100%)	⬇️
src/debug.ts	0% <0%> (-40%)	⬇️
src/ts-node.ts
src/util.ts
src/plugin.ts
src/config.ts
src/command.ts

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