Update README.md

README.md

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-Installation
-Install as a dev dependency (along with prettier) via npm:
 
-
-npm install --save-dev @swimlane/prettier-config-swimlane prettier@latest @trivago/prettier-plugin-sort-imports@latest
-
-Usage
-Create a file named prettier.config.js with the following contents:
-
-
-'use strict';module.exports = require('@dangl/prettier-config-dangl');
-
-Add a prettier script to package.json:
-
-
-{
-  "scripts": {
-    "prettier": "prettier --write \"**/*.js\""
-  }
-}
-
-Adjust the glob pattern as needed to include more file extensions. For example, \"**/*.{js,ts}\" will format both JavaScript and TypeScript files and etc. Files can be excluded with a .prettierignore file.
-Executing npm run prettier will now format a project's files.