chore(deps): update dependency react-syntax-highlighter to v15.4.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
react-syntax-highlighter	15.3.1 -> 15.4.1

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Release Notes

react-syntax-highlighter/react-syntax-highlighter

### [`v15.4.1`](https://togithub.com/react-syntax-highlighter/react-syntax-highlighter/blob/master/CHANGELOG.MD#​1541--2020-12-07) [Compare Source](https://togithub.com/react-syntax-highlighter/react-syntax-highlighter/compare/v15.4.0...v15.4.1) - Bugfix: increased minwidth to avoid unequal line number widths - Bugfix: prevent last line of file from rendering an unwanted line number ### [`v15.4.0`](https://togithub.com/react-syntax-highlighter/react-syntax-highlighter/blob/master/CHANGELOG.MD#​1540--2020-12-07) [Compare Source](https://togithub.com/react-syntax-highlighter/react-syntax-highlighter/compare/v15.3.1...v15.4.0) - Security fix: updated highlight.js to 10.4.1

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