Add prettier config

Author: bradlc

prettier.config.js

@@ -0,0 +1,9 @@
+module.exports = {
+  semi: false,
+  singleQuote: true,
+  printWidth: 100,
+  tabWidth: 2,
+  useTabs: false,
+  trailingComma: 'es5',
+  bracketSpacing: true,
+}