Update tests for FreeBSD and make these more visible by adding a badge (gorakhargosh#841)

* Update tests for FreeBSD

* Use more recent images (12.2- and 13.0-RELEASE because 12.1-RELEASE is End-of-Life since 31st January 2021)
* Test against Python 3.8 which is the default in the FreeBSD ports tree at the moment

* Add a badge for FreeBSD tests

* Make the FreeBSD tests visible (where Cirrus CI still needs to be set up for the repository)

Author: knobix

.cirrus.yml

@@ -1,18 +1,21 @@
-freebsd_instance:
-  image_family: freebsd-12-1
-
 task:
+  matrix:
+    freebsd_instance:
+      image_family: freebsd-13-0
+    freebsd_instance:
+      image_family: freebsd-12-2
+      
   install_script:
-    - pkg install -y python37 py37-sqlite3
+    - pkg install -y python38 py38-sqlite3
     # Print the Python version, only to be sure we are running the version we want
-    - python3.7 -c 'import platform; print("Python", platform.python_version())'
+    - python3.8 -c 'import platform; print("Python", platform.python_version())'
     # Check SQLite3 is installed
-    - python3.7 -c 'import sqlite3; print("SQLite3", sqlite3.version)'
+    - python3.8 -c 'import sqlite3; print("SQLite3", sqlite3.version)'
   setup_script:
-    - python3.7 -m ensurepip
-    - python3.7 -m pip install -U pip
-    - python3.7 -m pip install -r requirements-tests.txt
+    - python3.8 -m ensurepip
+    - python3.8 -m pip install -U pip
+    - python3.8 -m pip install -r requirements-tests.txt
   lint_script:
-    - python3.7 -m flake8 docs src tests tools
+    - python3.8 -m flake8 docs src tests tools
   tests_script:
-    - python3.7 -bb -m pytest tests
+    - python3.8 -bb -m pytest tests

README.rst

@@ -2,6 +2,7 @@ Watchdog
 ========
 
 |Build Status|
+|CirrusCI Status|
 
 Python API and shell utilities to monitor file system events.
 
@@ -301,3 +302,5 @@ to do:
 
 .. |Build Status| image:: https://github.com/gorakhargosh/watchdog/workflows/Tests/badge.svg
    :target: https://github.com/gorakhargosh/watchdog/actions?query=workflow%3ATests
+.. |CirrusCI Status| image:: https://api.cirrus-ci.com/github/gorakhargosh/watchdog.svg
+   :target: https://cirrus-ci.com/github/gorakhargosh/watchdog/