Missing ExecuteAll? Won't migrate...

Hey!

So, somehow my version of dynamoDB local is now missing the executeALL function? It's also refusing to load the migrations when I start the utility.

```
custom:
dynamodb:
start:
port: 8001
inMemory: true
migration: true
migration:
table_prefix: ${opt:stage}
dir: ./dynamolocal/migrations
```
The stage variable is set to local.

Help!

Start with the serverless configuration in the issue and reproduce it using DynamoDB Local with the shown migration settings. Check how the plugin handles the missing executeAll function and migration loading; done means the reported setup loads its migrations and exposes the expected function.

Written by the indexing model from the issue text.