chore(deps): update dependency filemanager-webpack-plugin to v3 - autoclosed

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
filemanager-webpack-plugin	2.0.5 -> 3.1.0

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Release Notes

gregnb/filemanager-webpack-plugin

### [`v3.1.0`](https://togithub.com/gregnb/filemanager-webpack-plugin/blob/master/CHANGELOG.md#v310-2020-01-16) [Compare Source](https://togithub.com/gregnb/filemanager-webpack-plugin/compare/v3.0.0...v3.1.0) ##### Features - support options to forward to `del` ([fe20026](https://togithub.com/gregnb/filemanager-webpack-plugin/commit/fe20026)) ### [`v3.0.0`](https://togithub.com/gregnb/filemanager-webpack-plugin/blob/master/CHANGELOG.md#v300-2020-12-26) [Compare Source](https://togithub.com/gregnb/filemanager-webpack-plugin/compare/v2.0.5...v3.0.0) No notable changes since v3.0.0-beta.0

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