Render API version into api.json

**Summary**
The API version is not set in the api.json

**Steps to Reproduce**
check the api.json["info"]["version"] field

**Expected Results**
The api.json["info"]["version"] field should be filled with the name of the latest entry in the api.json["versions"] field, eg. "3.8.2.7"

**Actual Results**
The api.json["info"]["version"] field shows 1.0.0