Subxtpy Milestone 2 (#1213)

* feat: add submission for subxtpy 2 milestone

* feat: update deliverable 2

deliveries/subxtpy_2.md

@@ -0,0 +1,28 @@
+# Milestone Delivery :mailbox:
+
+**The delivery is according to the official [milestone delivery guidelines](https://github.com/w3f/Grants-Program/blob/master/docs/Support%20Docs/milestone-deliverables-guidelines.md).**
+
+* **Application Document:** https://github.com/w3f/Grants-Program/blob/master/applications/subxt-python.md
+* **Milestone Number:** 2
+
+**Context** 
+The second milestone adds subscription and streaming support to the library making it more useful in real-time 
+processing scenarios. We've also provided further documentation and blog article explaining the project to raise 
+developer awareness around the usability of the project. The project has been republished as 0.2 version on 
+[pypi](https://pypi.org/project/subxtpy/). We've also built a tutorial example project using Flask for delivery 5.  
+
+**Deliverables**
+
+
+|  Number | Deliverable               | Link                                                                                                               |
+|--------:|---------------------------|--------------------------------------------------------------------------------------------------------------------|
+| **0a.** | License                   | [Apache 2.0](https://github.com/philoniare/subxtpy/blob/main/LICENSE.md)                                           |
+| **0b.** | Documentation             | [Readme](https://github.com/philoniare/subxtpy/blob/main/README.md)                                                |
+| **0c.** | Testing and Testing Guide | [Tests folder](https://github.com/philoniare/subxtpy/tree/main/tests)                                              |
+|     0e. | Article                   | [Streaming Support Article](https://www.philoniare.com/blog/real-time-subxtpy)                                     |
+|      1. | Subscription API          | [Source Code](https://github.com/philoniare/subxtpy/blob/442dfafa6164d3a01da7fdb58fc018930a936a00/src/lib.rs#L597) |
+|      2. | Streaming Support         | [Source Code](https://github.com/philoniare/subxtpy/blob/442dfafa6164d3a01da7fdb58fc018930a936a00/src/lib.rs#L425) |
+|      3. | Documentation Website     | [github.io/subxtpy](https://philoniare.github.io/subxtpy/)                                                         |
+|      4. | Example Scripts           | [Sample Python Scripts](https://github.com/philoniare/subxtpy/tree/main/tests)                                     |
+|      5. | Integration Guides        | [Flask example](https://github.com/philoniare/subxtpy-flask-example)                                                                                                                                                                                                
+|      6. | Published pypi package        | [pypi](https://pypi.org/project/subxtpy/)                                                                          |