update petridish@2.5.0 to helix-simulator@2.6.1 #317

[tripodsan]

see #317

[codecov]

Codecov Report

Merging #318 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master     #318   +/-   ##
=======================================
  Coverage   77.12%   77.12%           
=======================================
  Files          28       28           
  Lines        1460     1460           
  Branches      220      220           
=======================================
  Hits         1126     1126           
  Misses        334      334

Impacted Files	Coverage Δ
src/up.cmd.js	69.81% <100%> (ø)	⬆️

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[stefan-guggisberg]

@tripodsan i've changed the circleci image from circleci/node:8-stretch to circleci/node:8. now the circleci build succeeds.

[tripodsan]

thanks @stefan-guggisberg. I think I changed it one to get a more modern npm, but we don't need it anymore.