feat: add formatter

Author: Harsh Bajpai

.prettierrc

@@ -0,0 +1,7 @@
+{
+  "trailingComma": "all",
+  "tabWidth": 2,
+  "semi": true,
+  "singleQuote": true,
+  "printWidth": 80
+}

package.json

@@ -8,6 +8,7 @@
   "scripts": {
     "build": "tsc --project tsconfig.json && cp -r src/vendors dist/vendors",
     "clean": "rm -rf dist types",
+    "format": "prettier --write \"**/*.js\" \"**/*.ts\"",
     "lint": "eslint .",
     "test": "echo 1"
   },