feat: bump node version to 18 (#418)

### Summary

This bumps the node version of the project to `v18.12.0`(18 LtS)

#### Why?

1. Node.js 16 LTS is coming to end-of-life later this year.
[Source](https://nodejs.org/en/blog/announcements/nodejs16-eol)
2. You are not able to install the dependencies of react native example
app anymore. It raises the following error:
```
error metro-config@0.77.0: The engine "node" is incompatible with this module. Expected version ">=18". Got "16.18.1"
```

### Test plan

As this doesn't add any feature, we need to make sure the core
functionality is not broken and all the CI checks pass.

---------

Co-authored-by: Satyajit Sahoo <satyajit.happy@gmail.com>

.nvmrc

@@ -1 +1 @@
-16.18.1
+v18

packages/create-react-native-library/src/utils/generateExampleApp.ts

@@ -38,12 +38,12 @@ const PACKAGES_TO_ADD_DEV = {
 };
 
 const PACKAGES_TO_ADD_WEB = {
-  'react-dom': '18.1.0',
-  'react-native-web': '~0.18.9',
+  'react-dom': '18.2.0',
+  'react-native-web': '~0.18.10',
 };
 
 const PACKAGES_TO_ADD_WEB_DEV = {
-  '@expo/webpack-config': '^0.17.2',
+  '@expo/webpack-config': '^18.0.1',
   'babel-loader': '^8.1.0',
 };
 

packages/create-react-native-library/templates/common/$.nvmrc

@@ -1 +1 @@
-16.18.1
+v18