Bump follow-redirects, @slack/web-api and @slack/webhook#49

dependabot[bot] wants to merge 1 commit intomastertravisghansen/node-red-slack:masterfrom

dependabot/npm_and_yarn/follow-redirects-and-slack/web-api-and-slack/webhook-1.15.6travisghansen/node-red-slack:dependabot/npm_and_yarn/follow-redirects-and-slack/web-api-and-slack/webhook-1.15.6Copy head branch name to clipboard