Unable to save array entry for list<text> column

@raymondfeng is already working on this.

Since Oct 22, 2019.

I am using Cassandra datasource in loopback 3, and trying to store values in list datatype column of a table(keyspace) of Cassandra datasource. But while creating an entry from loopback explorer, we are getting **TypeError: Not a valid list value, expected Array obtained** '["Morning","Afternoon","Evening"]'

Here is my loopback model:
```
{
"name": "Time",
"base": "PersistedModel",
"idInjection": true,
"options": {
"validateUpsert": true
},
"properties": {
"options": {
"type": "array",
"format": "list"
}
},
"validations": [],
"acls": [],
"methods": {}
}
```
Tried debugging loopback-cassandra-datasource and saw **options** converted to string in params.

Data passed from loopback explorer:
```
{
"options": ["Morning","Afternoon","Evening"]
}
```

Data logged from beforeRemote hook of the model:
```
{ options:
[ 'Morning',
'Afternoon',
'Evening' ]
}
```
package.json
```
"dependencies": {
"loopback": "3.26.0",
"loopback-boot": "2.28.0",
"loopback-component-explorer": "6.4.0"
"loopback-connector-cassandra": "1.7.1"
}
```
The **typeof options** is object. I was debugging loopback cassandra connector and found **typeof options** as string in **encoder.js** of cassandra-driver node module. We have migrated from MongoDB to Cassandra and didn't face any issues for MongoDB driver. To what type or which format do I need to set for options property? Please let me know if any additional information required. Thank you in advance.