update elixir_make to 0.6.2

[boydm]

Description

Update elixir_make to 0.6.2 since 0.6.1 has been retired.

Motivation and Context

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to
  not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any feature
  but make things better)

Checklist

• Check other PRs and make sure that the changes are not done yet.
• The PR title is no longer than 64 characters.

[codecov]

Codecov Report

Merging #224 (6bb19fc) into master (60cb227) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #224   +/-   ##
=======================================
  Coverage   86.66%   86.66%           
=======================================
  Files          87       87           
  Lines        2340     2340           
=======================================
  Hits         2028     2028           
  Misses        312      312           

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