Incorrect objects spec due to incorrect indentation

**Describe the bug**
In 3 occasions a wrong indentation leads to incorrect configuration/spec of the object

**To Reproduce**
Use any Swagger/OpenAPI validation to inspect the objects:
- Order book->bids min/max items
- Order book->asks min/max items
- Leverage info->brackets required items
- other indentation issues

**Expected behavior**
Correct spec validation for objects

**Screenshots**
none

**Environment (please complete the following information):**
- Version of binance-api-swagger: any
- Tool name and version [e.g openapi-typescript version 4.4.0]: any

**Additional context**
none

Start by running an OpenAPI validator against the object definitions for Order book bids and asks and Leverage info brackets. Inspect their indentation and nesting, then verify that min/max items and required items validate correctly; check whether other indentation issues show the same problem.

Written by the indexing model from the issue text.