Update dependency sass-loader to v9.0.3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
sass-loader	devDependencies	patch	9.0.2 -> 9.0.3

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Release Notes

webpack-contrib/sass-loader

### [`v9.0.3`](https://togithub.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md#​903-httpsgithubcomwebpack-contribsass-loadercomparev902v903-2020-08-05) [Compare Source](https://togithub.com/webpack-contrib/sass-loader/compare/v9.0.2...v9.0.3)

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