move requires from let -> const

[stefanpenner]

No description provided.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@3f9bd75). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master     #194   +/-   ##
=========================================
  Coverage          ?   93.76%           
=========================================
  Files             ?       16           
  Lines             ?      513           
  Branches          ?        0           
=========================================
  Hits              ?      481           
  Misses            ?       32           
  Partials          ?        0

Impacted Files	Coverage Δ
lib/utils/config.js	100% <100%> (ø)
lib/tasks/try-each.js	84.7% <100%> (ø)
lib/utils/run-command.js	94.11% <100%> (ø)
lib/dependency-manager-adapters/bower.js	98.94% <100%> (ø)
lib/utils/scenario-manager.js	93.75% <100%> (ø)
lib/utils/find-ember-path.js	100% <100%> (ø)
lib/commands/try-ember.js	100% <100%> (ø)
lib/tasks/reset.js	100% <100%> (ø)
lib/dependency-manager-adapters/npm.js	98.75% <100%> (ø)
lib/commands/try-one.js	100% <100%> (ø)
... and 3 more

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