Update html-webpack-plugin from 3.1.0 to 3.2.0 in examples/polymer-cli
Update html-webpack-plugin from 3.1.0 to 3.2.0 in examples/polymer-cli

rhalff/storybook,rhalff/storybook,rhalff/storybook,storybooks/react-storybook,kadirahq/react-storybook,storybooks/storybook,kadirahq/react-storybook,rhalff/storybook,storybooks/react-storybook,storybooks/react-storybook,rhalff/storybook,storybooks/storybook,storybooks/storybook,storybooks/react-storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,storybooks/storybook,rhalff/storybook