Send the event schemas to the API

[aleks-tpom6oh]

The last piece is to send the data we prepared to the API.

TODO

• Sessions handling: Send session started events to the API #11
• Batching by size
• Batching by time

API doc

Endpoint: api.avo.app/inspector/v1/track
Method: POST

Every time the trackSchemaFromEvent method is called we need to send the following to the API:

{
  [
    {
      "appName": ...,
      "appVersion": ...,
      "libVersion": ...,
      "libPlatform": "go",
      "apiKey": ...,
      "sessionId": "11332f62-ba2d-11eb-8529-0242ac130003", // UUID
      "messageId": "4cffbdca-ba2e-11eb-8529-0242ac130003", // UUID
      "createdAt": "2021-05-21T09:05:40.735Z",
      "type": "sessionStarted",
    },
    {
      "appName": "...",
      "appVersion": "...",
      "libVersion": "...",
      "libPlatform": "go"
	"sessionId": "11332f62-ba2d-11eb-8529-0242ac130003", //UUID same as in the sessionStarted event
      "messageId": "54cafd77-c6cd-46b0-8459-69b59d44f012", // new UUID
      "createdAt": "2021-05-21T09:05:40.740Z",
      "type": "event",
      // Data we prepared before
      "eventName": "Onboarding Started",
      "eventProperties": [
        {
          "propertyName": "user",
          "propertyType": "object",
          "children": [
            {
              "propertyName": "id",
              "propertyType": "string"
            }
          ]
        },
        {
          "propertyName": "friendNames",
          "propertyType": "list",
           "children": ["string", "null"]
        },
        {
          "propertyName": "isAdmin",
          "propertyType": "bool",
        },
      ]
    },
  ]
}

### HTTP Responses

- Server returns a `200` response for successful API requests.
- Server returns a `400` response for invalid requests.
Invalid requests include:
    - `Content-type header missing`
    - `Invalid API key

Write tests for the trackSchemaFromEvent method and the payload generated for the API calls.

Reference

https://github.com/avohq/node-avo-inspector/blob/main/src/AvoNetworkCallsHandler.ts
https://github.com/avohq/node-avo-inspector/blob/main/src/__tests__/TestNetworkCallsHandler.ts
https://github.com/avohq/node-avo-inspector/blob/main/src/__tests__/TestNetworkCallsHandlerPublic.ts