Updated CONTRIBUTING.md for setup of venv and standard pip install (#127)

* Updated CONTRIBUTING.md for setup of venv and standard pip install

* Updated CONTRIBUTING.md with proposed changes

* Fixes

Co-authored-by: Matt Watson <[email protected]>

Author: adhadse

CONTRIBUTING.md

@@ -26,12 +26,14 @@ development environment and run the unit tests. This is covered in section
 ### Step 3. Create a pull request
 
 Once the change is ready, open a pull request from your branch in your fork to
-the master branch in [keras-team/keras-nlp](https://github.com/keras-team/keras-nlp).
+the master branch in 
+[keras-team/keras-nlp](https://github.com/keras-team/keras-nlp).
 
 ### Step 4. Sign the Contributor License Agreement
 
 After creating the pull request, you will need to sign the Google CLA agreement.
-The agreement can be foiund at [https://cla.developers.google.com/clas](https://cla.developers.google.com/clas).
+The agreement can be found at
+[https://cla.developers.google.com/clas](https://cla.developers.google.com/clas).
 
 ### Step 5. Code review
 
@@ -47,20 +49,24 @@ Once the pull request is approved, a team member will take care of merging.
 
 ## Setup environment
 
+Python 3.7 or later is required.
+
 Setting up your KerasNLP development environment requires you to fork the
-KerasNLP repository, clone the repository, install dependencies, and execute
-`python setup.py develop`.
+KerasNLP repository, clone the repository, create a virtual environment, and 
+install dependencies.
 
 You can achieve this by running the following commands:
 
 ```shell
 gh repo fork keras-team/keras-nlp --clone --remote
 cd keras-nlp
-pip install ".[tests]"
-python setup.py develop
+python -m venv ~/keras-nlp-venv
+source ~/keras-nlp-venv/bin/activate
+pip install -e ".[tests]"
 ```
 
-The first line relies on having an installation of [the GitHub CLI](https://github.com/cli/cli).
+The first line relies on having an installation of
+[the GitHub CLI](https://github.com/cli/cli).
 
 Following these commands you should be able to run the tests using
 `pytest keras_nlp`. Please report any issues running tests following these
@@ -114,4 +120,5 @@ like - `: invalid option`
 
 ## Community Guidelines
 
-This project follows [Google's Open Source Community Guidelines](https://opensource.google/conduct/).
+This project follows 
+[Google's Open Source Community Guidelines](https://opensource.google/conduct/).