Update dependency firebase-tools to v7.7.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
firebase-tools	devDependencies	minor	7.6.2 -> 7.7.0

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Release Notes

firebase/firebase-tools

v7.7.0

Compare Source

• Fixed an issue in Firestore Emulator where batchGet and transactions does not work over REST.
• Make additional setIamPolicy call when creating HTTP functions to ensure they continue to be publicly available.
• Prevent duplicate rulesets from being created.

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