MAPG-94 create Bitbucket pipeline for unit testing

bitbucket-pipelines.yml

@@ -0,0 +1,15 @@
+image: php:7.4.7-cli-buster
+
+pipelines:
+    default:
+        - step:
+            name: Unit Testing
+            caches:
+                - composer
+            artifacts:
+                - vendor/**
+            script:
+                - apt-get update && apt-get install -y unzip
+                - curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+                - composer install
+                - vendor/bin/phpunit --testdox tests