Update dependency electron-devtools-installer to v3.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
electron-devtools-installer	devDependencies	minor	3.0.0 -> 3.1.0

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Release Notes

MarshallOfSound/electron-devtools-installer

### [`v3.1.0`](https://togithub.com/MarshallOfSound/electron-devtools-installer/releases/v3.1.0) [Compare Source](https://togithub.com/MarshallOfSound/electron-devtools-installer/compare/v3.0.0...v3.1.0) ##### Features - add electron 9 support ([#​131](https://togithub.com/MarshallOfSound/electron-devtools-installer/issues/131)) ([ab713a6](https://togithub.com/MarshallOfSound/electron-devtools-installer/commit/ab713a639c0ea96ffcdb3970f869de7e05f55ee5))

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