[MOB-8359] Add Expirements APIs

[a7medev]

Description of the change

Added support for:

• Instabug.addExperiments
• Instabug.removeExperiments
• Instabug.clearAllExperiments

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Issue links go here

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests

Code review

• This pull request has a descriptive title and information useful to a reviewer
• Issue from task tracker has a link to this pull request

[AliAbdelfattah]

Looks good overall 💪
One minor comment.

[codecov]

Codecov Report

Merging #671 (0f75552) into master (6b4ea10) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #671      +/-   ##
==========================================
+ Coverage   88.23%   88.31%   +0.07%     
==========================================
  Files          24       24              
  Lines         459      462       +3     
  Branches       91       91              
==========================================
+ Hits          405      408       +3     
  Misses         46       46              
  Partials        8        8              

Impacted Files	Coverage Δ
jest/mockInstabug.js	100.00% <ø> (ø)
index.js	78.62% <100.00%> (+0.50%)	⬆️

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