chore: update dependencies and switch to async/await

[justmoon]

• Switch to async/await
• Turn on linting for whole codebase, not just src
• Update eslint dependencies
• Fix lint issues
• Update all dependencies
• Add customizable connect timeouts (mocha 4 no longer force exits, so the tests were hanging waiting for a 10 second connect timeout)

[codecov-io]

Codecov Report

Merging #121 into master will decrease coverage by 0.1%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #121      +/-   ##
==========================================
- Coverage   96.08%   95.98%   -0.11%     
==========================================
  Files          12        9       -3     
  Lines         562      249     -313     
  Branches       84       25      -59     
==========================================
- Hits          540      239     -301     
+ Misses         22       10      -12

Impacted Files	Coverage Δ
src/utils/details.js	97.64% <ø> (ø)	⬆️
src/utils/packet.js	90% <100%> (ø)	⬆️
src/utils/index.js	100% <0%> (+4.16%)	⬆️

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[sublimator]

Welcome to c# 2012 haha