update version of "pg" (postgresql node.js module) to latest version

[nelsonic]

fixes #32

[codecov]

Codecov Report

Merging #33 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master    #33   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          33     33           
=====================================
  Hits           33     33

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[nelsonic]

Hi @naazy & @iteles,
This PR just updates the dependencies and package version on NPM.
Thanks for reviewing & merging. 👍

[iteles]

LGTM Thanks for updating @nelsonic! 👌🏻🎉
@naazy This should be fully backwards compatible but let us know if there are any issues!
Merging so we can deploy and test in OA dev environment.