Use sodium-universal instead of sodium-native

[ghost]

Description

By using sodium-universal, this PR fixes an issue which occurs when randomBytes function is executed in the browsers.

Universal wrapper for sodium-javascript and sodium-native working in Node.js and the Browser

Motivation and Context

How has this been tested?

Screenshots (if appropriate):

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 not work as expected)

Checklist:

• Add tests to cover changes as needed.
• Update documentation as needed.

[codecov-commenter]

Codecov Report

Merging #343 (95a35d7) into dev (5c2e7cd) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev     #343   +/-   ##
=======================================
  Coverage   80.80%   80.80%           
=======================================
  Files          44       44           
  Lines        1782     1782           
  Branches      295      294    -1     
=======================================
  Hits         1440     1440           
  Misses        341      341           
  Partials        1        1           

Impacted Files	Coverage Δ
packages/zilliqa-js-crypto/src/random.ts	90.90% <100.00%> (ø)

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