feat: new default api version definition algorithm

[scolladon]

What does this pull request contain?

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• Added (for new features).
• Changed (for changes in existing functionality).
• Deprecated (for soon-to-be removed features).
• Removed (for now removed features).
• Fixed (for any bug fixes).
• Security (for vulnerability fixes).

Explain your changes

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When --api-version parameter is set then use this version
Else try to find the sourceApiVersion from the sfdx-project.json
If the API version found is not handled by the plugin then use the latest and log a warning in the result

Some changes have been required in the metadataManager in order to get the latest api version handled by the plugin and to check if a version is managed by the plugin

Does this close any currently open issues?

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closes #362

• Jest test added to check the fix is applied.

Any particular element that can be tested locally

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use the -a parameter and play with the possible values
use a sfdx-project.json file and play with the sourceApiVersion attribut value

Any other comments

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unit tests try to represent the full spec of this feature

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (1c11843) compared to base (72551cd).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #372   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines          767       792   +25     
=========================================
+ Hits           767       792   +25     

Impacted Files	Coverage Δ
src/locales/en.js	100.00% <ø> (ø)
src/main.js	100.00% <100.00%> (ø)
src/metadata/metadataManager.js	100.00% <100.00%> (ø)
src/utils/cliHelper.js	100.00% <100.00%> (ø)

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[codeclimate]

Code Climate has analyzed commit 1c11843 and detected 0 issues on this pull request.

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