[BUG] Typescript axios withSeparateModelsAndApi param can't be used from cli

Created by: seanlaff

The withSeparateModelsAndApi param given as a cli argument cannot be typecast. Not sure if this is a problem with openapi-generator itself or just the axios generator.

Version: 4.0.0beta3

What I ran

docker run --rm -v ${PWD}:/output openapitools/openapi-generator-cli generate \
    -i /output/my_swagger.json \
    -g typescript-axios \
    --additional-properties=withSeparateModelsAndApi=true \
    -o /output/src \

Error

Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Boolean
	at org.openapitools.codegen.languages.TypeScriptAxiosClientCodegen.processOpts(TypeScriptAxiosClientCodegen.java:135)

@mvniekerk I see you originally added this param. Do you know if Im using it correctly?