Allow passing additional configuration to the internal dynamo db… (#67)

Allow passing additional configuration to the internal dynamo db client

Author: vladgolubev

setup.js

@@ -12,13 +12,16 @@ const DEFAULT_OPTIONS = ['-sharedDb'];
 
 module.exports = async function() {
   const config = require(resolve(cwd(), 'jest-dynamodb-config.js'));
-  const {tables, port: port = DEFAULT_PORT, options: options = DEFAULT_OPTIONS} =
+  const {tables, port: port = DEFAULT_PORT, options: options = DEFAULT_OPTIONS, clientConfig} =
     typeof config === 'function' ? await config() : config;
+
   const dynamoDB = new DynamoDB({
-    endpoint: 'localhost:' + port,
+    endpoint: `localhost:${port}`,
     sslEnabled: false,
-    region: 'local-env'
+    region: 'local-env',
+    ...clientConfig
   });
+
   global.__DYNAMODB__ = await DynamoDbLocal.launch(port, null, options);
 
   await createTables(dynamoDB, tables);