Update dependency web-ext to v3.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
web-ext	devDependencies	patch	3.2.0 -> 3.2.1

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Release Notes

mozilla/web-ext

### [`v3.2.1`](https://togithub.com/mozilla/web-ext/releases/3.2.1) [Compare Source](https://togithub.com/mozilla/web-ext/compare/3.2.0...3.2.1) #### Bug Fixes - Increased `web-ext sign` default timeout ([#​1748](https://togithub.com/mozilla/web-ext/issues/1748)) See all changes: [3.2.0...3.2.1](https://togithub.com/mozilla/web-ext/compare/3.2.0...3.2.1)

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