chore(deps): update dependency gas-webpack-plugin to v1.0.5

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gas-webpack-plugin	devDependencies	patch	1.0.4 -> 1.0.5

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Release Notes

fossamagna/gas-webpack-plugin

### [`v1.0.5`](https://togithub.com/fossamagna/gas-webpack-plugin/blob/master/CHANGELOG.md#​105-httpsgithubcomfossamagnagas-webpack-plugincomparev104v105-2020-08-24) [Compare Source](https://togithub.com/fossamagna/gas-webpack-plugin/compare/v1.0.4...v1.0.5) ##### Bug Fixes - Enable to work with es3ify and source map ([2f8fa79](https://togithub.com/fossamagna/gas-webpack-plugin/commit/2f8fa796603605ec07dd3eb3d301113dc7ffd156))

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