Function isValidEC2InstanceType

isValidEC2InstanceType(instanceType: string): boolean
Check if an EC2 instance type exists in the dataset.
Parameters
- instanceType: string
  The instance type to check
Returns boolean
True if the instance type exists, false otherwise
Example
```
import { isValidEC2InstanceType } from 'aws-instance-info'

console.log(isValidEC2InstanceType('m5.large')) // true
console.log(isValidEC2InstanceType('m5.invalid')) // false
console.log(isValidEC2InstanceType('t3.micro')) // true
```
- Defined in ec2.ts:234