feat!: CLI option spec-version defaults to 1.6

[jkowalleck]

fixes #1173

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00%	✅ ∅ (target: 80.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (edb3165)	1332	1080	81.08%
Head commit (aa19a5e)	1332 (+0)	1080 (+0)	81.08% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1258)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[jkowalleck]

was released via https://github.com/CycloneDX/cyclonedx-node-npm/releases/tag/v2.0.0