Rename command-line argument for validate-integrity

[yoavain]

Description

Rename command-line argument from --validate-integrity-sha512 to --validate-integrity to match the Twitter announcement of the new feature.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Checklist:

• I have updated the documentation (if required).
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I added a picture of a cute animal cause it's fun

[codecov-commenter]

Codecov Report

Base: 97.95% // Head: 97.95% // No change to project coverage 👍

Coverage data is based on head (f0dc33f) compared to base (c4180ef).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #144   +/-   ##
=======================================
  Coverage   97.95%   97.95%           
=======================================
  Files          13       13           
  Lines         342      342           
  Branches       73       73           
=======================================
  Hits          335      335           
  Misses          7        7           

Impacted Files	Coverage Δ
packages/lockfile-lint/src/config.js	100.00% <ø> (ø)

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