Add option for detecting changes to flag overrides

[adams85]

Describe the purpose of your pull request

Moves the createFlagOverridesFromMap function to the configcat-common package and adds an optional parameter named watchChanges to the function which controls whether the client should detect changes to the flag override map after client initialization.

Related issues (only if applicable)

https://trello.com/c/9jqzNyAI/381-konzisztencian%C3%B6vel%C5%91-improvementek

Requirement checklist (only if applicable)

• I have covered the applied changes with automated tests.
• I have executed the full automated test set against my changes.
• I have validated my changes against all supported platform versions.
• I have read and accepted the contribution agreement.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (1ec2efe) 92.71% compared to head (9c48b21) 92.68%.

❗ Current head 9c48b21 differs from pull request most recent head 634adfb. Consider uploading reports for the commit 634adfb to get more accurate results

Files	Patch %	Lines
src/index.ts	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #101      +/-   ##
==========================================
- Coverage   92.71%   92.68%   -0.03%     
==========================================
  Files          21       21              
  Lines        2072     2079       +7     
  Branches      562      565       +3     
==========================================
+ Hits         1921     1927       +6     
- Misses        150      151       +1     
  Partials        1        1              

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[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud