message: add homepage
diff: {
  "name": "botbuilder-adapter-slack",
  - "version": "1.0.0",
  - "description": "",
  - "main": "lib/index.js",
  + "version": "4.0.0-prelease-1",
  + "description": "Connect Botkit or BotBuilder to Slack",
  + "main": "./lib/index.js",
  + "typings": "./lib/index.d.ts",
  + "files": [
  + "/lib",
  + "/src"
  + ],
  "scripts": {
  "build": "tsc",
  "test": "echo \"Error: no test specified\" && exit 1",
  - "eslint": "./node_modules/.bin/eslint --fix src/*",
  - "start": "node ./index.js"
  + "eslint": "./node_modules/.bin/eslint --fix src/*"
  + },
  + "author": "Microsoft Corp.",
  + "license": "MIT",
  + "keywords": [
  + "slack",
  + "botkit",
  + "botbuilder",
  + "botframework",
  + "bots",
  + "chatbots",
  + "azure"
  + ],
  + "homepage": "https://github.com/howdyai/botkit/blob/packages/botbuilder-adapter-slack#readme"
  + "bugs": {
  + "url": "https://github.com/howdyai/botkit/issues"
  + },
  + "repository": {
  + "type": "git",
  + "url": "https://github.com/howdyai/botkit.git"
  },
  - "author": "",
  - "license": "ISC",
  "dependencies": {
  "@slack/client": "^4.7.0",
  - "botbuilder": "^4.2.0",
  - "botbuilder-dialogs": "^4.2.0",
  - "botframework-config": "^4.2.0",
  + "botbuilder": "^4.3.0",
  + "botbuilder-dialogs": "^4.3.0",
  + "botframework-config": "^4.3.0",
  "botkit": "^4.0.0",
  "debug": "^4.1.0",
  "dotenv": "^6.0.0",
  