Included references to 0.8 in master README.md

Author: lucagiove

CONTRIBUTING.md

@@ -60,15 +60,15 @@ During the 17th April 2020 meetup we had the following todo list.
 
 ### New plans for 0.8 version
 - [X] **Feature:** [New On Session keywords](https://github.com/MarketSquare/robotframework-requests/issues/276) [Angelo, Nicola, Roberta]
-- [ ] **Experiment:** [Reorganize Keywords in classes](https://github.com/MarketSquare/robotframework-requests/issues/270)
+- [x] **Experiment:** [Reorganize Keywords in classes](https://github.com/MarketSquare/robotframework-requests/issues/270)
 
 ### Early Adopters and feedback needed for 0.8
 You can add in your requirements the alpha version in this way:
 
     pip install git+https://github.com/MarketSquare/robotframework-requests@0.8#egg=robotframework-requests
 
 ### Others
-- [ ] **Review PR:** [Support sending arrays in query string and request body](https://github.com/MarketSquare/robotframework-requests/pull/220)
+- [X] **Review PR:** [Support sending arrays in query string and request body](https://github.com/MarketSquare/robotframework-requests/pull/220)
 - [ ] **Review PR:** [disable cert warnings](https://github.com/MarketSquare/robotframework-requests/pull/209)
 - [ ] **Feature:** [Allow passing auth param to create client cert session](https://github.com/MarketSquare/robotframework-requests/issues/245)
 - [ ] **Tech:** [Deprecate To Json keyword in favor of response.json attribute](https://github.com/MarketSquare/robotframework-requests/issues/219)

README.md

@@ -89,3 +89,16 @@ Send your questions to the
 # Contribute
 
 See the [How To Contribute](CONTRIBUTING.md) to the project page.
+
+### NEW 0.8 pre-release alpha version available
+
+Please install it:
+
+```bash
+pip install robotframework-requests --pre
+```
+
+and give us feedback!
+
+- [0.8 README](https://github.com/MarketSquare/robotframework-requests/blob/0.8/README.md)
+- [0.8 Keywords documentation](https://robotframework-requests.netlify.app/doc/requestslibrary)