Update tutorial with new images (#92)

Author: camilamaia

_tutorials/step01.md

@@ -12,7 +12,7 @@ ScanAPI.
 
 ScanAPI is a Python library. For installing ScanAPI, you will need:
 
-- \- [python][python] version 3.6 or higher
+- \- [python][python] version 3.7 or higher
 - \- [pip][pip-installation], the standard package manager for Python
 
 If you are new to the Python world, no worries, this
@@ -28,10 +28,10 @@ Check that ScanAPI is installed properly:
 
 ```shell
 $ scanapi --version
-scanapi, version 2.3.0
+scanapi, version 2.8.0
 ```
 
-The output should return a version equal to 2.3.0 or higher.
+The output should return a version equal to 2.8.0 or higher.
 
 [pip-installation]: https://pip.pypa.io/en/stable/installing/
 [python]: https://www.python.org/

_tutorials/step03.md

@@ -44,12 +44,11 @@ $ scanapi run
 From the output of the command, you can see that ScanAPI:
 
 ```shell
-Loading file scanapi.yaml # loads the specification file you created
-Writing documentation # starts writing the report for your API
-Making request GET http://demo.scanapi.dev/api/v1/health/ # makes a GET request to the /health path
+INFO     Loading file scanapi.yaml # loads the specification file you created
 
+- Making request GET http://demo.scanapi.dev/api/v1/health/  # makes a GET request to the /health path
 The documentation was generated successfully.
-It is available at <your_root_path>/scanapi-report.html # generates the API documentation
+It is available at -> <your_root_path>/scanapi-report.html # generates the API documentation
 ```
 
 It is time to check the results! Open the generated file `scanapi-report.html` in your browser.

_tutorials/step13.md

@@ -260,7 +260,7 @@ CircleCI Project. Follow these steps to create the missing env vars:
 
 > [CircleCI - Setting an Environment Variable in a project][circle-ci-env-var]
 
-Now, let's change `scanapi-action.yaml` to access the env variables you've just created:
+Now, let's change `config.yml` to access the env variables you've just created:
 
 ```yaml
 {% raw %}version: 2.1