Upgrade Prettier from 1.17 to 2.0.2.

Summary:
This gets us on the latest Prettier 2.x:
https://prettier.io/blog/2020/03/21/2.0.0.html

Notably, this adds support for TypeScript 3.8,
which introduces new syntax, such as `import type`.

Reviewed By: zertosh

Differential Revision: D20636268

fbshipit-source-id: fca5833d003804333a05ba16325bbbe0e06d6c8a

packages/react-native-codegen/src/generators/modules/GenerateModuleCpp.js

@@ -112,7 +112,7 @@ module.exports = {
     moduleSpecName: string,
   ): FilesOutput {
     const nativeModules = Object.keys(schema.modules)
-      .map(moduleName => {
+      .map((moduleName) => {
         const modules = schema.modules[moduleName].nativeModules;
         if (modules == null) {
           return null;
@@ -124,10 +124,10 @@ module.exports = {
       .reduce((acc, modules) => Object.assign(acc, modules), {});
 
     const modules = Object.keys(nativeModules)
-      .map(name => {
+      .map((name) => {
         const {properties} = nativeModules[name];
         const traversedProperties = properties
-          .map(property => traverseProprety(property))
+          .map((property) => traverseProprety(property))
           .join('\n');
         return moduleTemplate
           .replace(/::_MODULE_PROPERTIES_::/g, traversedProperties)