build: remove node 14 and add node 20 support

[scolladon]

Explain your changes

---

Remove installation test for node 14 as sfdx is compatible at least with the current LTS
Add installation test for node 20
Update the engine to point to the actual active current LTS (16)
Node 14 is deprecated from sfdx standpoint

Add dependency linter
Ensure sane dependency management and as light as possible package

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	6		0	0.1s
✅ COPYPASTE	jscpd	yes		no	2.96s
✅ JAVASCRIPT	eslint	69	0	0	6.68s
✅ JAVASCRIPT	prettier	69	0	0	3.26s
✅ JSON	eslint-plugin-jsonc	20	0	0	2.74s
✅ JSON	jsonlint	20		0	0.22s
✅ JSON	npm-package-json-lint	yes		no	0.49s
✅ JSON	prettier	20	0	0	0.38s
✅ JSON	v8r	20		0	11.98s
✅ MARKDOWN	markdownlint	10	0	0	0.7s
✅ MARKDOWN	markdown-link-check	10		0	12.23s
✅ MARKDOWN	markdown-table-formatter	10	0	0	0.26s
✅ REPOSITORY	checkov	yes		no	11.54s
✅ REPOSITORY	gitleaks	yes		no	2.76s
✅ REPOSITORY	git_diff	yes		no	0.02s
✅ REPOSITORY	secretlint	yes		no	1.65s
✅ REPOSITORY	trivy	yes		no	3.84s
✅ SPELL	cspell	130		0	5.96s
✅ TYPESCRIPT	eslint	2	0	0	1.76s
✅ YAML	prettier	12	1	0	0.44s
✅ YAML	v8r	12		0	17.53s
✅ YAML	yamllint	12		0	0.26s

See detailed report in MegaLinter reports

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b2e36e6) 100.00% compared to head (a5c7e36) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #614   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           32        32           
  Lines          898       889    -9     
=========================================
- Hits           898       889    -9     

Impacted Files	Coverage Δ
src/utils/gitConstants.js	100.00% <ø> (ø)
src/utils/metadataConstants.js	100.00% <ø> (ø)

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[codeclimate]

Code Climate has analyzed commit a5c7e36 and detected 0 issues on this pull request.

View more on Code Climate.

[github-actions]

Shipped in release v5.21.0.
You can install the new version using the version number or the latest-rc channel

$ sfdx plugins:install sfdx-git-delta@latest-rc
$ sfdx plugins:install [email protected]