Encyrption SDK requires you have aws sdkv3 and sdkv2 installed

AFAIK, the sdkv2 + v3 compatibility in https://github.com/awslabs/aws-encryption-sdk-javascript/blob/master/modules/kms-keyring/src/kms_types.ts#L28-L34 is not working as expected. It requires the user have both SDKV2 and V3 installed.