Bump terser-webpack-plugin from 3.0.7 to 3.0.8
Bump terser-webpack-plugin from 3.0.7 to 3.0.8

Bumps [terser-webpack-plugin](https://github.com/webpack-contrib/terser-webpack-plugin) from 3.0.7 to 3.0.8.
- [Release notes](https://github.com/webpack-contrib/terser-webpack-plugin/releases)
- [Changelog](https://github.com/webpack-contrib/terser-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/terser-webpack-plugin/compare/v3.0.7...v3.0.8)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
stweil/openlayers,ahocevar/openlayers,oterral/ol3,stweil/openlayers,bjornharrtell/ol3,bjornharrtell/ol3,stweil/ol3,ahocevar/ol3,openlayers/openlayers,adube/ol3,bjornharrtell/ol3,stweil/ol3,oterral/ol3,oterral/ol3,adube/ol3,stweil/ol3,ahocevar/ol3,adube/ol3,stweil/openlayers,ahocevar/openlayers,stweil/ol3,ahocevar/ol3,ahocevar/ol3,openlayers/openlayers,openlayers/openlayers,ahocevar/openlayers