CI: Add FreeBSD 12.3 (#88)

.cirrus.yml

@@ -1,7 +1,18 @@
-freebsd_instance:
-  image_family: freebsd-13-1
+Dinit on freebsd-13.1-amd64 CI_task:
+  freebsd_instance:
+    image_family: freebsd-13-1
+
+  Getting depends_script: pkg update && ASSUME_ALWAYS_YES=YES pkg install gmake m4 file
+  Print clang++ architecture_script: clang++ -dumpmachine
+  Build_script: gmake
+  Print dinit executive file architecture_script: file ./src/dinit
+  Unit tests_script: gmake check
+  Integration tests_script: gmake check-igr
+
+Dinit on freebsd-12.3-amd64 CI_task:
+  freebsd_instance:
+    image_family: freebsd-12-3
 
-task:
   Getting depends_script: pkg update && ASSUME_ALWAYS_YES=YES pkg install gmake m4 file
   Print clang++ architecture_script: clang++ -dumpmachine
   Build_script: gmake