Change nodejs support

[adam2k]

Add node support to travis and remove support for node 6 and 7.

[codecov[bot]]

Codecov Report

Merging #191 (bf75654) into master (18597dd) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #191   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          146       146           
  Branches        37        37           
=========================================
  Hits           146       146           

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 18597dd...bf75654. Read the comment docs.

[adam2k]

@kr1sp1n this is related to #189. I'm attempting to remove istanbul and use nyc instead, but there isn't support for node versions older than 8 for nyc from what the tests are reporting in #189.

[adam2k]

@kr1sp1n anything we can help with to get some of these issues resolved? Is it possible to add others to this repo as code reviewers?

[aviadhahami]

Trying to get this in asap :)

[aviadhahami]

@adam2k --> Travis was removed + Upgraded node; closing