update var to es6

[rubs019]

#324 PR of discussion

[codecov]

Codecov Report

Merging #325 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #325   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines         595    594    -1     
  Branches      149    149           
=====================================
- Hits          595    594    -1

Impacted Files	Coverage Δ
lib/index.js	100% <100%> (ø)	⬆️
lib/util.js	100% <100%> (ø)	⬆️
lib/sig.js	100% <100%> (ø)	⬆️
lib/info.js	100% <100%> (ø)	⬆️

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[fent]

Cool! Do you mind doing this for files in the test and example folders too? I'd rather handle this change all at once

One more thing, a .DS_Store file was added to this PR, please remove.

[rubs019]

Yes I can do it
For the .DS_Store I just create a new commit and add DS_Store && .idea in gitignore

Let me know if it's ok for you

[fent]

Thanks for taking the time for this, even though it was probably tedious

[rubs019]

No probs, this is my first contribution on an open-source project. I chose something easy and necessary in a certain way ^^