Bump: 0.11.0-next -> 0.12.0

[fisuda]

Proposed changes

This PR node-red-contrib-letsfiware-NGSI version from 0.11.0-next -> 0.12.0.

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Update only documentation, not any source code.

Checklist

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• I have read the CONTRIBUTING doc
• I have signed the CLA
• I have updated the change log (CHANGELOG.md)
• I have added tests that prove my fix is effective or that my feature works
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• Any dependent changes have been merged and published in downstream modules

Further comments

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[coveralls]

Coverage: 100.0%. Remained the same when pulling a4ccfc1 on fisuda:release/0.12.0 into b8a4918 on lets-fiware:main.

[coveralls]

Coverage: 100.0%. Remained the same when pulling a4ccfc1 on fisuda:release/0.12.0 into b8a4918 on lets-fiware:main.