Bump async from 2.6.3 to 2.6.4 in /src#522

dependabot[bot] wants to merge 1 commit intodevelopWirecloud/wirecloud:developfrom

dependabot/npm_and_yarn/src/async-2.6.4Wirecloud/wirecloud:dependabot/npm_and_yarn/src/async-2.6.4Copy head branch name to clipboard