Bump acorn from 6.3.0 to 6.4.1 in /voteapp-graphql-server#4

dependabot[bot] wants to merge 1 commit intomasterreactbuch/vote-example-v2:masterfrom

dependabot/npm_and_yarn/voteapp-graphql-server/acorn-6.4.1reactbuch/vote-example-v2:dependabot/npm_and_yarn/voteapp-graphql-server/acorn-6.4.1Copy head branch name to clipboard