Update dependency firebase-functions to v3.6.2

[mend-for-github-com]

This PR contains the following updates:

Package	Type	Update	Change
firebase-functions	dependencies	patch	3.6.1 → 3.6.2

By merging this PR, the issue #24 will be automatically resolved and closed:

Severity	CVSS Score	Vulnerability
High	7.4	CVE-2020-8203
High	7.2	CVE-2021-23337

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Release Notes

firebase/firebase-functions (firebase-functions)

v3.6.2

Compare Source

• Pin @types/express version to 4.17.3 to fix type definition issue (Issue #​685).
• Firestore onCreate, onUpdate, and onDelete now receive a QueryDocumentSnapshot instead of DocumentSnapshot, which guarantees that data is not undefined (Issue #​659).
• Modify return type of DataSnapshot.forEach to boolean | void match firebase-admin SDK.

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