chore: add and fix prettier

Author: asnunes

.eslintrc.js

@@ -6,6 +6,8 @@ module.exports = {
   },
   extends: [
     'plugin:@typescript-eslint/recommended',
+    'prettier/@typescript-eslint',
+    'plugin:prettier/recommended', // Enables eslint-plugin-prettier and eslint-config-prettier. This will display prettier errors as ESLint errors. Make sure this is always the last configuration in the extends array.
   ],
   rules: {},
 };

.prettierrc.js

@@ -0,0 +1,7 @@
+module.exports = {
+  semi: true,
+  trailingComma: "all",
+  singleQuote: true,
+  printWidth: 120,
+  tabWidth: 2,
+};

package-lock.json

@@ -50,9 +50,10 @@
     "jest": "24.9.0",
     "lint-staged": "^10.4.0",
     "ts-jest": "^26.3.0",
-    "typescript": "^4.0.2"
+    "typescript": "^4.0.2",
+    "prettier": "^2.1.1"
   },
   "dependencies": {
     "xmldom": "^0.3.0"
   }
-}
+}