Update dependency terser-webpack-plugin to ^1.3.0

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
terser-webpack-plugin	devDependencies	minor	^1.3.0	source

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Release Notes

webpack-contrib/terser-webpack-plugin

v1.3.0

Compare Source

Features

• update terser to 4 version (#​97) (15d1595)

1.2.4 (2019-05-15)

Bug Fixes

• disable parallel on WSL due bugs (#​90) (d9533dd)
• fallback for cache directory (#​86) (3cdd2ed)

v1.2.4

Compare Source

Features

• update terser to 4 version (#​97) (15d1595)

1.2.4 (2019-05-15)

Bug Fixes

• disable parallel on WSL due bugs (#​90) (d9533dd)
• fallback for cache directory (#​86) (3cdd2ed)

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