Update dependency nexmo to v2.7.0

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
nexmo	dependencies	patch	2.7.0-beta-1 → 2.7.0

By merging this PR, the issue #14 will be automatically resolved and closed:

Severity	CVSS Score	Vulnerability
Critical	9.8	CVE-2021-3918
High	7.5	CVE-2025-65945

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Release Notes

nexmo/nexmo-node (nexmo)

v2.7.0

Compare Source

• ADDED: Made apiKey and apiSecret optional when applicationId and privateKey are present in Nexmo constructor.

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