Update dependencies

[fregante]

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[fregante]

It's been 2 years and a half, it's time to move on:

• Webpack5 Error: Content and Map of this Source is not available (only size() is supported)  GoogleChromeLabs/size-plugin#40

Before

        background.js ⏤  24.2 kB
          options.css ⏤  2.62 kB
         options.html ⏤  2.12 kB
           options.js ⏤  42.6 kB
   refined-github.css ⏤  16.9 kB
    refined-github.js ⏤  152 kB
 resolve-conflicts.js ⏤  1.33 kB

After

Entrypoint refined-github 690 KiB = refined-github.css 55.5 KiB refined-github.js 635 KiB
Entrypoint background 121 KiB = background.js
Entrypoint options 187 KiB = options.css 6.86 KiB options.js 180 KiB
Entrypoint resolve-conflicts 3.5 KiB = resolve-conflicts.js
webpack compiled successfully in 8107 ms

Good enough. Plus it shows the real size instead of the misleading gzipped size