Update dependency webextension-polyfill to ^0.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
webextension-polyfill	dependencies	minor	^0.4.0 -> ^0.5.0

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Release Notes

mozilla/webextension-polyfill

### [`v0.5.0`](https://togithub.com/mozilla/webextension-polyfill/releases/0.5.0) [Compare Source](https://togithub.com/mozilla/webextension-polyfill/compare/0.4.0...0.5.0) #### Bug Fixes - Removed `browser.runtime.getBrowserInfo()`, as it is not available in Chromium-based browsers ([#​200](https://togithub.com/mozilla/webextension-polyfill/issues/200)) - The webextension-polyfill now throws an error when loaded in non-extension contexts ([#​190](https://togithub.com/mozilla/webextension-polyfill/issues/190)) #### Docs - README.md: Added a new ["Usage with webpack without bundling"](https://togithub.com/mozilla/webextension-polyfill#usage-with-webpack-without-bundling) section ([#​194](https://togithub.com/mozilla/webextension-polyfill/issues/194)) - README.md: [Clarify why Chrome-only methods have no Promise](https://togithub.com/mozilla/webextension-polyfill#no-promise-returned-on-chrome-for-some-api-methods) ([#​183](https://togithub.com/mozilla/webextension-polyfill/issues/183)) See [all changes for 0.5.0](https://togithub.com/mozilla/webextension-polyfill/compare/0.4.0...0.5.0) -

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