Tzatziki {{var}} reporting interpretation

🚀 **Feature Request**

Hello 👋🏼

**Subject**: Allow tzatziki {{var}} interpretation in report.

**Example**:
```
Scenario: This is an example of scenario used in our team
Given we post "{{tillURL}}/acquisitions":
"""
{"value": "3608399888925"}
"""
And we get "{{tillURL}}/transactions/current"

# ⬇️ here I will retrieve and save in {{id}} my uuid data return by previous step
And we save result as id

And we patch "{{tillURL}}/transactions/current/status":
"""
{"status": "CANCELED"}
"""

# ⬇️ here I will call another endpoint by my {{id}} value to assert his new status
When we get "{{tillURL}}/transactions/{{id}}"
Then we receive a status OK_200 and:
"""
{
"id": "{{id}}",
"status": "CANCELED"
}
"""
```
We are using since few weeks tzatziki for our integration tests and sometimes we should retrieve some data (not unique like an id, uuid, etc) before to do some calls.

**Our problem**: all {{var}} are not interpreted by our cucumber html (based on cucumber.json generated)

**Example**:
The cucumber.json generated after tests looks like to:
```
{
"result": {
"duration": 139339000,
"status": "passed"
},
"line": 23,
"name": "we get \"{{tillURL}}/transactions/{{id}}\"", # ⬅️ example
"match": {
"arguments": [
{....},
{
"val": "{{tillURL}}/transactions/{{id}}", # ⬅️ example
"offset": 8
}
],
{....}
},
"keyword": "When "
}
```

Our cucumber html report is generated from the cucumber.json: