Nepse-api

New features:
- There are methods to access `MarketSummary`
- There are methods to access `CompanyHistory`

Changes:
- New tests were written for the methods.
- `MarketClient` and `SecurityClient` modules were updated for new methods.

This version contains Pre Patch for the nepse api change.

Now the users can get floorsheet data from the API handler.

v.1.1.0
A broker-client has been added and now users can get the broker data from the API wrapper.

As NEPSE API had some updates which would break this library, this release is a patch for interacting with the new API.

This is the first stable release of the wrapper. This release consists of various changes and features. Check the docs for more info.

Testing
Unit testing has been created. The tests will be done before every commit. And after commit by GitHub actions as well.

Httpx
Have switched to `httpx.AsyncClient` instead of `aiohttp.ClientSession`.

Minor changes
- Client Wrapper has been created for fetching data from API rather than directly.
- Some typos fixing and better formatting