botocore (dynamo db) instrumentation doesn't capture 'db.statement'

According to the specs - db.statement should capture the database statement that is being executed.

Steps to reproduce
Instrument a client using BotocoreInstrumentor().
Send a request to the db.

What is the expected behavior?
Produce a span with a db.statement value containing the database statement.

What is the actual behavior?
Produce a span without generating db.statement.

Example:
Here is an example of the information that is being collected when running one of the instrumentation tests
test class: test_botocore_dynamodb
test name: test_update_item

{
   "rpc.system":"aws-api",
   "rpc.service":"DynamoDB",
   "rpc.method":"UpdateItem",
   "aws.region":"us-west-2",
   "db.system":"dynamodb",
   "db.operation":"UpdateItem",
   "net.peer.name":"dynamodb.us-west-2.amazonaws.com",
   "aws.dynamodb.table_names":"(""test_table")",
   "aws.request_id":"wcTntqQfzhNsJNLB5qsk385hT274tmBUUWAkWZPUarUlaXTkb1Xw",
   "retry_attempts":0,
   "http.status_code":200,
   "aws.dynamodb.consumed_capacity":"(""{\"TableName\": \"test_table\", \"CapacityUnits\": 0.5}"
}

Additional context:
I would also suggest adding an optional flag 'capture_statement' (default - off) that will enable or disable capturing the information in order to provide privacy.

If you can - assign this to me, thanks :)