Function getEC2Instances

getEC2Instances(
instanceTypes: string[],
): Promise<Map<string, EC2InstanceDetails>>
Get multiple EC2 instances at once. Loads all data in a single bulk fetch then serves from cache.
Parameters
- instanceTypes: string[]
  Array of instance types to fetch
Returns Promise<Map<string, EC2InstanceDetails>>
Promise resolving to Map of instance type to details
Example
```
import { getEC2Instances } from 'aws-instance-info/async'

const instances = await getEC2Instances(['m5.large', 'm5.xlarge', 'c7.2xlarge'])

for (const [type, details] of instances) {
  console.log(`${type}: ${details.vCPUs} vCPUs`)
}
// m5.large: 2 vCPUs
// m5.xlarge: 4 vCPUs
// c7.2xlarge: 8 vCPUs
```
- Defined in ec2.async.ts:359