Upgrade ava and argon2 versions

[thetutlage]

Since, Ava has received a major update, have to tweak the tests a little to get them passing.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@900c5ae). Click here to learn what that means.
The diff coverage is 100.00%.

❗ Current head d5dcd92 differs from pull request most recent head 4489a4a. Consider uploading reports for the commit 4489a4a to get more accurate results

@@            Coverage Diff            @@
##             master      #33   +/-   ##
=========================================
  Coverage          ?   98.83%           
=========================================
  Files             ?        1           
  Lines             ?       86           
  Branches          ?        0           
=========================================
  Hits              ?       85           
  Misses            ?        1           
  Partials          ?        0           

Impacted Files	Coverage Δ
index.js	98.83% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[thetutlage]

There seems to an issue with eslint-plugin-import that is making it fail on windows. import-js/eslint-plugin-import#1643

Apart from that the PR must be good to go. If required, I can squash commits to a single commit