chore(deps): update node.js to 10,12

[renovate[bot]]

This PR contains the following updates:

Package	New value	References	Sourcegraph
node	10,12	source

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[codecov-io]

Codecov Report

Merging #641 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #641   +/-   ##
======================================
  Coverage    82.4%   82.4%           
======================================
  Files          15      15           
  Lines        2126    2126           
  Branches      448     509   +61     
======================================
  Hits         1752    1752           
  Misses        364     364           
  Partials       10      10

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