Update crypto browserify to latest version

[ChristianMurphy]

Description of changes:

Updates crypto-browserify to version 3.
Resolves alert in snyk audit.

✗ High severity vulnerability found on crypto-browserify@1.0.9
- desc: Insecure Randomness
- info: https://snyk.io/vuln/npm:crypto-browserify:20140722
- from: aws-amplify@0.2.14 > amazon-cognito-identity-js@2.0.3 > crypto-browserify@1.0.9
No direct dependency upgrade can address this issue.

https://snyk.io/vuln/npm:crypto-browserify:20140722

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-io]

Codecov Report

Merging #731 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #731   +/-   ##
=======================================
  Coverage   86.65%   86.65%           
=======================================
  Files          74       74           
  Lines        3529     3529           
  Branches      671      671           
=======================================
  Hits         3058     3058           
  Misses        454      454           
  Partials       17       17

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[richardzcode]

👍

[github-actions]

This pull request has been automatically locked since there hasn't been any recent activity after it was closed. Please open a new issue for related bugs.

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